King of The Mountain rules
UP HILL SNOW DRAGS MARCH 26th 2022
Location is Ski Cape Smokey Ski Hill Ingonish Cape Breton
TECH OPENS AT 8:00 am ends at 9:30am sharp.
Kids classes start at 10:00am and larger classes immediately after.
There will be random Bore checks completed. If you pay for a class and the Engine is found to have a larger bore then the sled is registered for, you will be removed from that class and no refund will be given.
NO ALCOHOL OR DRUGS ALLOWED ON SITE
Directions from the NFLD Ferry in North Sydney: https://goo.gl/maps/5grEg5TyGwUSaQuq8
Directions form the Canso Causeway @ Port Hawkesbury: https://goo.gl/maps/Pj9a445gL7EZzvQw7
SKI CAPE SMOKEY UPHILL SNOWMOBILE DRAG RACE RULES/CLASSES
This will be Rubber tracks only, No studs in these Classes.
The track will be 500′ in length, 3 lanes.
Stock Turbos will enter the 1000 2-Stroke Stock Class.
Race day March 26th with a rain day of March 27th
Registration fees:
$45 + HST for Early Online Pre-registration
$50 + HST for Saturday registration
$20 + HST for Insurance for each machine racing
$20 + HST for kids (covers cost of insurance and classes) Age 12 and under
Each race will be $15 + HST (three classes per sled)
A “Top Gun 2 stroke class” will be added to the event this year as well as King of the Mountain. There must be at least 3 sleds to run a class.
Tethers mandatory in ALL CLASSES
Tek vests mandatory in Improved, Pro-Stock, Turbo Classes, Top 2 Stroke, Outlaw and KOTM.
Tek Vests highly recommended for your safety in all other classes.
Race Day Classes: See below for detailed description.
Improved And Pro stock are based heavily off ISR Rules. You can read through these rules or click on the link. There will be no scales on site.
http://www.isrracing.org/tempPDF/Snow%20Drag%20Racing.pdf
Three class’s of Mini’s (Ages 5-12)
Stock, Improved, 200cc Stock class
250cc Stock Class for machines like the Bravos
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in King of the Hill class must comply with the General Rules Section.
- Snowmobiles must meet all safety requirements for their base class. If a snowmobile has no base class it will be assessed by the tech director on an individual basis.
- Must Have Tether and Tek Vest
- Turbo and Powder Adder Rules listed below
- General Rules: Snow Drags
- Randomly checking Bore.
- Machines in stock class will be required to remove heat shield if requested.
- Any call made by an official is final, any disagreement will result in disqualification.
- Any racer that has alcohol/drugs, or is with someone caught with alcohol/drugs will be disqualified and give up all money paid to race.
- All racers will have to sign a waiver for insurance.
- Must be a minimum of three sleds to have a class.
- Racers will pay for the classes they want to enter first and then go through tech inspection.
- Any sled caught cheating will lose there money or have choice to enter different class. No refunds.
- Stock and trail Improved classes are not allowed race fuel. If smelled you will not be allowed to race.
- No sleds will be allowed on the track until the sled has passed Tech.
Stock Class
(Aftermarket Mufflers not allowed)
1. The snowmobile must have original OEM for the model engine, hood, frame, cowl, gas tank, carburetion, airbox, suspension and variable speed converter. Named components must be OEM for the model and year, or properly filed OEM replacement parts that supersede the original OEM parts. Factory options are not allowed.
2. All snowmobiles must comply with the GENERAL RULES AND REGULATIONS SECTION.
ENGINE
1. No component of the engine may be altered, changed, reduced or enlarged from the engine manufacturer’s original stock specifications, nor may any additional components be added to the engine. Blueprinting of engines is not allowed. No removal of material whatsoever will be allowed. This is to include polishing, port matching, deburring, glass or sand blasting surfaces or material removal for the purpose of engine balancing or other reasons.
2. Maximum cylinder overbore for wear cannot exceed .020 inches (1/2mm).
3. Replacement pistons must be stock OEM for the model.
4. There will be no more than one-cylinder base gasket to a cylinder. No changes in engine dimensions can be made by gasket adjustments.
5. Spark plugs do not necessarily have to be OEM equipment in Stock classes.
6. OEM carburetor slide valve and replacement jet components, without modification, are allowed in all classes. No modification to carburetor body will be allowed.
7. On snowmobiles with OEM electronic fuel injection, commercially available electronic control modules may be added to the OEM ECU for the purpose of increasing or decreasing fuel delivery only. The added module must be designed to plug directly into the OEM ECU and/or the OEM wire harness without modification.
9. On snowmobiles equipped with electronic fuel injection, it can replace the non-adjustable fuel pressure regulator with any commercially available, mechanically adjustable fuel pressure regulator. (Unless OEM for the model, no electronically controlled fuel pressure regulators are allowed.) The regulator and mechanical adjustment device must be installed under the hood of the snowmobile and not be accessible to the driver while seated on the snowmobile.
10. Airbox may not be modified. A redesigned ram air box is not allowed.
11. No additional fuel pumps may be added to stock carbs.
12. Oil injection pump must remain in place and remain functional. Lines may be removed and plugged. Oil injector nozzles may be removed, and holes may be plugged. Premix gasoline may be used.
13. Engine must retain OEM for the model cooling system.
14. On liquid cooled snowmobiles the cooling circuits cannot be modified or removed. Thermostats may be removed.
15. Harmonic balancer may not be removed.
16 The complete OEM exhaust system must be used as furnished and filed by the manufacturer for the model.
DRIVE
1. Any combination of springs, weights and ramps may be used in the clutches. There is no maximum clutch engagement RPM.
2. No machining on clutches to accommodate springs and weights.
3. No machining, grinding, cutting or welding allowed on clutches unless otherwise specified.
4. Material not to be added to primary clutch ramps or flyweights.
5. Secondary clutch cams may be cut to any angle. Billet helixes allowed.
6. No overdrive machining.
7. Drive belt need not be OEM for the model.
8. Any drive chain and sprockets may be used. Track sprockets/drivers must remain OEM for the model. On stock race models, track drive sprockets may be interchanged to accommodate the listed designated tracks. The sprockets must be OEM for the brand and the same material and diameter. (+-0.5 inches as the OEM sprockets for the same make and model.
9. Drive Sprockets must be OEM for the brand and of the same material and diameter (± 0.5 inches) as the OEM sprockets for the model.
10. OEM for the model brake system including master cylinder, caliper and disk, must remain as produced by the OEM and must be fully functional. No other brake components may be added.
SKI SUSPENSION & STEERING
1. Any steel or titanium suspension springs allowed. OEM for the model design concept must be maintained.
2. Must maintain two (2) inches of remaining compression travel with driver on snowmobile.
3. Shocks must remain OEM for the model and remain in the OEM location. On rebuildable shocks, spacers may be added internally to limit rebound travel, but not compression travel.
4. Handlebar extensions are allowed. All ends must be plugged.
5. Handlebars with OEM mountain handles may be replaced with any OEM handlebar within the brand.
6. Radius rods may be located anywhere on the trailing arm where the manufacturer has drilled or partially drilled for radius rod mounting holes.
SKIS & SKI RUNNERS
1. Aftermarket skis allowed. Skis must be commercially available and marketed through normal sales activity. Minimum aftermarket ski length must be 40 inches. Ski width may not be trimmed. Skis may not be interchanged between brands. Replacement ski must be the same material as OEM ski for the model (i.e. plastic to plastic, steel to steel). Lower ski surface must remain OEM material.
2. Skis may be reinforced but must remain in the original configuration. This reinforcing must be on the upper surface of the ski only.
TRACK SUSPENSION
1. The complete suspension must be used as furnished and filed by the manufacturer. There will be no suspension options permitted in Stock classes. Track suspension may be located anywhere in the tunnel where the manufacturer has drilled, partially drilled or marked for mounting holes. Pre-drilled plates may be drilled out to facilitate suspension adjustment. Pre-drilled backing plate holes may not be enlarged or slotted.
2. Any steel or titanium suspension springs allowed. Torsion springs (not coil springs) may be shortened at the long end to prevent contact with the track. OEM for the model design concept must be maintained.
3. Must maintain two (2) inches of remaining compression travel with driver on snowmobile.
4. Marginal snow wheels and related hardware may be added to or removed from slide rails. Structural integrity must be maintained.
5. Rear axle idler wheels must remain OEM for the model. OEM for the model rear idler wheels may be added to the rear axle.
6. Shocks must remain OEM for the model and remain in the OEM location. On rebuildable shocks, spacers may be added internally to limit rebound travel, but not compression travel.
7. No device may be added that stops the suspension from going thru its normal bottoming action.
TRACK & TRACTION
1. No cutting, trimming or shaving of the track or rubber. The track must be used as produced by the molder of the track.
2. Minimum lug height from the flat of the track is 0.50 inch.
3. The track may not be reversed.
4. Track clips and guide clips may be replaced when worn. Guide clips may be removed and replaced with track clips. Track clips may be removed and replaced with guide clips. The track must retain the original number of clips with which it was produced.
5. Any commercially available, one-piece, molded rubber track is allowed. Any width and lug height allowed if no modifications to tunnel or suspension to install track.
FRAME & BODY
1. Snowmobile width shall be as produced by the OEM manufacturer.
2. Any chassis alterations, additions or removals, which alter stock appearances or dimensions are not allowed.
3. Tunnel can be repaired but must remain OEM for the model length.
4. Windshield and windshield molding may be removed. 5. No additional venting allowed. 6. Protective taping or screening will be restricted to the external openings only.
IGNITION & ELECTRICAL
1. Ignition must be OEM for the year and model.
2. Fixed ignitions may be advanced or retarded.
3. No aftermarket device allowed which interrupts ignition for the purpose of launch control or traction control unless OEM for the model.
4. Lighting coil must remain in place.
5. Electrical wiring must remain in place.
TRAIL IMPROVED CLASS
ACCEPTIBLE ITEMS TO CHANGE
- All Stock class items
- Reeds
- Cut Heads or aftermarket billet heads
- Port & Polish
- Cylinder Bore Must be within class cc limit
- Aftermarket Exhaust single pipe. No twin Pipes if your sled came with OEM Single pipe
- Air box or air filters
- Advance Timing
- Track drivers
- Rail Extensions and Track Swaps
- Oversize rear idler wheel kits
- Base gaskets and head gaskets
- OEM carburetors can be bored
- Carburetor boots
- Adjustable Fuel controller (Cannot be accessible to driver while racing)
- CDI Boxes Must be OEM
IMPORTANT ITEMS NOT TO TOUCH
NO RACE FUEL IN TRAIL IMPROVED CLASS
- OEM Stroke
- OEM Crankshaft
- OEM Chassis
- OEM Suspension
- No aftermarket Cylinders
- Taillight/Headlight must be OEM
- Snow Flap
- No Light weight parts
- No Quick disconnect cool-down
- No small gas tanks inside OEM Tanks
- Engine must be OEM for the Model
In stock and stock-based classes, no change or modification is allowed unless specifically allowed by these rules. If these rules do not specifically allow a change or modification, then it must be assumed that the change or modification is not allowed.
GENERAL SNOWMOBILE REQUIREMENTS
- Snowmobile must begin as a qualified stock snowmobile. All snowmobiles must comply with GENERAL RULES AND REGULATIONS SECTION.
- Any alterations allowed in Stock are allowed in Improved Stock.
- The snowmobile must have original OEM for the model engine, frame, suspension, fuel tank and seat. Named components must be OEM for the model and year, or properly filed OEM replacement parts that supersede the original OEM parts. Factory options are not allowed.
ENGINE
- Engine components must be OEM for the model unless otherwise specified. May be modified internally, but engine must retain its complete external stock appearance and dimensions. Parts identification numbers must not be removed.
- Cylinders must be OEM for the model. Must remain within OEM shell dimensions to include crevices, bulges, etc. No visible external changes allowed even if the area is hidden by another part or bracket. Number of cylinders must be OEM for the model. No external fastening devices allowed to secure or hold cylinders in place.
- The cylinders may be raised to change port height. If a plate is used to raise cylinder height, the plate, including gaskets, cannot exceed 1/2 inch (0.50 inch) in thickness.
- Engine may be bored up to class limit. A one percent (1%) overbore allowed. (EXAMPLE: 670cc engine may be bored up to 707cc’s and may not be bored up to 800cc’s to run in the 800cc class).
- Crankshaft and crankcase must be OEM for the model. OEM stroke must be maintained. No modification allowed to the external surfaces of the crankcase even if the area is hidden by another part or bracket.
- Cylinder head(s) must be OEM for the model. The cylinder head may be modified internally including changing replaceable combustion chambers and machining out combustion chambers to use replaceable inserts. The visible, outer portion of the cylinder head or cylinder head cover must remain stock appearing, and the spark plug must maintain OEM location.
- Engine components allowable for modification or replacement. a. Bearings b. Rods (rod center to center must remain the same) c. Pistons d. Piston pins e. Rings f. Gaskets
- Reeds and reed blocks may be changed, (external plate may be thicker) if they do not change the outside dimensions of the cylinder or crankcase. No external modifications may be made to the crankcase or cylinder to accommodate reed block change.
- Carburetors, flanges and intake manifold must be OEM for the model. Internal modifications are allowed. Carburetor throat may be bored. Intake concept and location must remain OEM for the model.
- On snowmobiles with OEM for the model Electronic Fuel Injection the throttle body, including the exterior, may be modified for increased fuel flow. No welding of the throttle body allowed (not even for repairs). Systems that allow increased fuel delivery may be used (i.e. Power Commander or others). The stock control module must be used. No changes for increased airflow allowed. Increasing the size of throttle body throat not allowed. OEM for the model throttle plate (butterfly) must be used without modification.
- Except as noted, additional fuel delivery system or pressure charging is not allowed.
- Internal and external modifications may be made to the airbox. Airbox may be removed. Air filters may be used.
- Oil pumps may be removed or disabled. Oil tank must be removed. Oil injector nozzles may be removed and plugged. (If oil tank and overflow tank are joined the oil tank must be disabled or the joined tanks removed.)
- Flywheel / harmonic balancer may not be removed.
- Torque arms allowed.
- Rigid motor mounts allowed. OEM for the model engine location must be maintained. Replacing or adding metallic engine mounts is not allowed. Replacing rubber/cushion parts with more rigid parts is allowed.
- Cooling systems must be operational. May contain disconnects for cool down. Heat exchangers may be relocated, modified or removed.
- Any functionally silenced exhaust system allowed. A commercially available, functionally silenced muffler/silencer must be installed and operational.
- Exhaust outlet must exit body downward and rearward. (If OEM exhaust exits behind driver, pipe need not go downward). The minimum combined downward, rearward angle is 70° (from centerline of crankshaft). Exhaust pipe must not extend more than 3 in. beyond chassis or body.
DRIVE SYSTEM
- Any primary and secondary clutch may be used. Roller secondary clutches allowed.
- Primary clutch and secondary clutch may be modified (no RPM limit).
- Jackshafts, of like material and weight, may be changed to accommodate a clutch change. No welding allowed on a jackshaft. Steel and chromoly allowed. Titanium not allowed unless OEM for the model. OEM location of shaft must be maintained.
- Any track drive sprocket and non-driving wheels allowed on the track drive axle. Unless specified, no changes in drive, frame, or suspension allowed to accept track drive sprockets.
- Track drive axle and chain case must remain OEM for the model and remain in OEM location.
SKI SUSPENSION & STEERING:
- Ski suspension and shocks must be OEM for the model and remain in OEM location.
- Ski stance must be OEM for the model.
- Must maintain two (2) inches of remaining compression travel with driver on snowmobile.
- Handlebars with mountain handles may be replaced with any OEM handlebar within the brand.
SKIS & SKI RUNNERS:
- Aftermarket skis allowed. Skis must be commercially available and marketed through normal sales activity. Minimum aftermarket ski length must be 40 inches. Ski width may not be trimmed. Skis may not be interchanged between brands. Lower ski surface must remain OEM.
TRACK SUSPENSION:
- OEM for the model suspension must be used. Suspension may be moved up and down in the tunnel (limit 3 inches). OEM location must be maintained and may not protrude beyond tunnel configuration.
- Must maintain two (2) inches of downward compression travel with driver on snowmobile.
- Shocks must be OEM for the model and remain in OEM location.
- Any size, material, and number of rear axle idler wheels allowed. Unless specified, no modification to chassis or suspension allowed to accept idler wheels. Rear axle may be moved upward in the slide rails to accept larger rear idler wheels.
TRACK & TRACTION
- Any commercially available one-piece molded rubber track allowed. No cleated tracks allowed. Unless specified, no modification to drive, frame or suspension allowed to install track. 2. Commercially available long track rails and rail extensions allowed. Track must remain untouched (no trimming for width). Minimum lug height is 0.500 inches.
- Snowmobile must maintain a minimum of twenty (20) inches of track length on the course surface when snowmobile is under full power.
FRAME & BODY:
- Any chassis alterations, additions or removals, which alter stock appearance or dimensions are not allowed. Tunnel can be repaired but must maintain OEM length.
- The OEM fuel tank must be the only tank that can be used for fuel supply. Oil injection tanks may not be used as a fuel tank.
- Removal of any insulation that alters the outside stock appearance is not allowed.
- Any hood or side panels that maintain stock appearance (as defined) for the make and model may be used.
IGNITION & ELECTRICAL
- Ignition must be OEM for the model.
- Fixed ignitions may be moved (+ or -) four (4) degrees.
- No aftermarket device allowed which interrupts ignition for the purpose of launch control or traction control unless OEM for the model.
- Lighting coil must remain in place.
- A pony pac ignition system may be installed on four cylinder, 2-stroke Yamaha engines, allowing a change in the firing order to one hundred eighty (180) degrees.
- Tachometers, speedometers and/or heat gauges may be added or removed.
- Open instrument holes must be closed.
- Electrical wires/wire harnesses and instrument drive cables may be removed.
- Headlight assembly may be removed (opening must be closed). Headlight consoles are not considered part of headlight assembly.
PRO STOCK CLASS
- The engine must be from a stock qualified snowmobile.
- Cylinder maximum overbore is limited to two (2) percent over the cc displacement for the class.
- Cylinder, crankcase, crankshaft and heads may be interchanged within the brand.
- Welding on the crankcase allowed.
- Induction concept and location must remain OEM for the model.
- Any carburetor or fuel injection may be used. Only one venturi allowed per cylinder.
- No super charging, turbo charging or nitrous allowed.
- EFI models may be changed to carburetor induction.
- Turbo Exhaust must be constructed in a manner that the exhaust outlet is not directed at the driver or competitor.
- Exhaust systems cannot compromise/exceed overall snowmobile length and width.
- Exhaust stinger must be directed downward and rearward.
- Exhaust system must be functionally silenced.
- Exhaust system must fit within overall maximum length and width rules.
SKI SUSPENSION AND STEERING
- Front suspension and shocks must be in a position that maintains stock appearance and is representative of the make and model of the snowmobile declared by the builder.
- Sled must have a minimum ride height of three (3) inches measured at the lowest point of the bulkhead, /skid plate. Measurement point to be centered directly in front of the track drive area, (using the spindle centers to determine center point of bulkhead) and must retain 2 inches of remaining compression travel with driver on snowmobile.
- Stock spindles may be reinforced or replaced. Replacement spindles must have a minimum wall thickness of .120 inch and minimum outside diameter of .750 inch. An inspection hole is required if wall thickness is not visible.
- If modifications to suspension parts are made, structural integrity must be maintained.
- (Hill Drag Only) Must maintain 6’’ (inches) of vertical suspension measured at the front bumper.
SKIS & SKI RUNNERS
- Any commercially available OEM appearing, or aftermarket ski may be used provided the original spring concept remains the same.
- Minimum ski length is twenty (20) inches. a. Hill Drag Only: Maximum ski length is forty (40) inches.
TRACK SUSPENSION:
- Any aftermarket or OEM suspension is allowed. Modifications to OEM or any commercially available aftermarket suspensions must maintain structural integrity. 1. Must be a minimum of 2 inches of remaining compression travel with driver on snowmobile. Must be a minimum of 6 inches (Hill Drag Only)
TRACK & TRACTION
- Any commercially available one-piece molded rubber track allowed. No cleated tracks allowed.
- Track lug height may be trimmed to a minimum of ½ inch lug height (Hill Drag one (1) inch). No other track trimming allowed. 3. Minimum track width is 13.5 inches. 4. Snowmobile must maintain twenty (20) linear inches of track length on the course surface when the snowmobile is under full power.
FRAME & BODY:
- Snowmobile must resemble stock model of chosen brand. Seat, windshield and tunnel must be stock appearing.
- Windshields are required.
- Commercially available aftermarket and custom frames are allowed. Design and structural integrity are subject to technical inspection for safety and compliance to general rules section.
- All aftermarket and custom frame components except braces, brackets, and gussets must be manufactured from 4130 chromoly tubing and plate or 6061 -T6 aluminum plate. Use of stock OEM bulkhead allowed, and reinforcement of same is allowed.
- Stock tunnels may be used with any commercially available aftermarket or custom front end.
- Motor mounts and jackshafts may be changed from original location.
- Any engine location is allowed if stock snowmobile profile is maintained.
- No additional bodywork that changes stock appearance allowed.
- Ventilation openings may be covered.
- Suspension side skirts are prohibited.
- Aerodynamic devices, airfoils, and wings are prohibited. 12. Openings for component accessibility are allowed.
- The hood and belly pan may be removable if OEM appearance for the declared model and brand is maintained.
- Aftermarket body panels and approved duplications of production bodies of any material will be permitted.
- Seats other than OEM stock, are allowed, but must resemble production-based seats. Stock seats may be cut down for lower profile but must maintain stock configuration.
- Snowmobiles using production or aftermarket tunnels that measure less than .125 inch in thickness shall add additional sheet or sheets of metal to the tunnel to achieve .125 thickness. The sheet metal shall be the same width as the tunnel and shall extend from the rear of the tunnel to the horizontal centerline of the track drive axle. Tunnels 1/8-inch (.125) thick or thicker do not require this added sheet provided that the 1/8-inch (.125) tunnel extends to the horizontal centerline of the track drive axle. 17. A skid plate (belly pan) is required.
- Front air dams allowed. Must be a minimum of 2 inches above the ground with front suspension fully compressed.
DRIVE
- The clutch cover must be separate of the cowl configuration and cover the clutch perimeter and faces to the center of the clutch bolt or below. Must be .090 inch 6061 T6 aluminum or equivalent steel material the outer perimeter must be covered with 6-inch belting. No other clutch cover material is allowed. If 0.125-inch aluminum or steel is used, belting is recommended but not required. Snowmobiles with removable side panels may fasten clutch covers/ shields to side panels to meet this requirement.
*1. Engine must be based on a stock qualified snowmobile engine, not to exceed three (3) cylinders unless OEM four (4) cylinder. 2. Cylinder maximum overbore is limited to (two) 2% over the cc displacement for the class. 3. Aftermarket cylinders allowed. 4. Welding on crankcase allowed. 5. Aftermarket crankcase allowed. 6. Can be fuel injected or carbureted. Only one venturi per cylinder allowed.
IMPROVED STOCK TURBO CLASS
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in Improved Stock Turbo class must comply with the GENERAL RULES SECTION
- Race Director shall have the authority to determine structural integrity and ability for safe and reliable race operation.
- The snowmobile must be equipped with a tether switch and cord that can be attached to the driver at all times when the snowmobile is started and/or running. This switch is in addition to the emergency shutdown button which also must remain functional.
ENGINE
- The following four stroke engines are allowed:
a. Arctic Cat 2 cylinder limited to 1056 displacement +2% over bore allowed.
b. Ski Doo 3 cylinder limited to 1170 displacement +2% over bore allowed.
c. Yamaha 3 cylinder limited to 1049 displacement+2% over bore allowed.
d. Yamaha 4 cylinder limited to 998 displacement +2% over bore allowed. - Can be fuel injected or carbureted. Only one venturi per cylinder.
- Air to Air intercoolers only. Intercooler can be aftermarket but must be air to air concept.
- No methanol injection allowed.
- All sleds must use an OEM Arctic Cat turbo charger PN 3007-806. The Arctic Cat turbo charger must not be altered or modified in any way to enhance performance.
- Any ignition allowed.
DRIVE
- A manufactured or modified original clutch guard, separate from the cowl, for the model primary clutch system must be provided and provide adequate protection from a primary clutch explosion that would cast parts in all directions. The guards must have sufficient mounting plates and reinforced with belting or meet approval of the Technical Director. The manufactured guard must be fully functional and mounted in the OEM location.
FRAME AND BODY
- Any chassis alterations, additions or removals, which alter stock appearance or dimensions, are not allowed. Tunnel can be repaired but must maintain OEM length.
- The OEM fuel tank must be the only tank that can be used for fuel supply. Oil injection tanks may not be used as a fuel tank.
- Removal of any insulation that alters the outside stock appearance is not allowed.
- Any hood or side panels that maintain stock appearance (as defined) for the make and model may be used.
SKI SUSPENSION AND STEERING
- Any aftermarket rear suspension shock may be used, but must resemble the production shock in approximate overall body length, body diameter, and mounting eye overall length.
- Ski stance must be OEM for the model.
- (Grass, Ice and Snow Drags only) Must maintain a minimum of two (2) inches of remaining compression travel with driver on snowmobile.
- Any OEM handlebar for the brand may be used.
SKIS & SKI RUNNERS
- Aftermarket skis allowed. Skis must be commercially available and marketed through normal sales activity. Minimum aftermarket ski length must be 40 inches
- Ski width may not be trimmed. Skis may not be interchanged between brands.
- Lower ski surface must remain OEM.
TRACK SUSPENSION
- OEM for the model suspension must be used. Suspension may be moved up and down in the tunnel (limit 3 inches). OEM location must be maintained and may not protrude beyond tunnel configuration.
- Must maintain two (2) inches of downward compression travel with driver on snowmobile.
- Any aftermarket rear suspension shock may be used, but must resemble the production shock in approximate overall body length, body diameter, and mounting eye overall length.
- Any size, material, and number of rear axle idler wheels allowed. Unless specified, no modification to chassis or suspension allowed to accept idler wheels. Rear axle may be moved upward in the slide rails to accept larger rear idler wheels.
- Commercially available long track rails and rail extensions allowed. To facilitate installation of long track rails, suspension may be moved up or down in the tunnel (a limit of three inches). The front torque arm must be OEM stock and located in the stock location on the slide rail. Rear torque arm must remain OEM stock for the model and may be relocated to accommodate the longer track and rail assembly. Suspension components must remain OEM stock for the model.
- Tunnel must be extended to accommodate the longer track and suspension.
- An approved tunnel enclosure must be added. Enclosure must be a minimum of .125” thick aluminum thick, extend a minimum of 2” behind the track, be the same width as the tunnel and installed such that the bottom of the enclosure is at the centerline of the rear axle and the rear provides a mounting surface for the rear flap.
TRACK & TRACTION
- Any commercially available one-piece molded rubber track allowed. Track must be race designated by the molder of the track. No cleated tracks allowed. Unless specified, no modification to drive, frame or suspension allowed to install track.
- Commercially available long track rails and rail extensions allowed.
- Track must remain untouched (no trimming).
- Minimum lug height from the flat of the track is 0.50 inch; the maximum lug height of a replacement track is 1 1/2 inch.
- Snowmobile must maintain a minimum of twenty (20) inches of track length on the course surface when snowmobile is under full power.
4-STROKE TURBO MAX CLASS
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in 4-Stroke Turbo Max class must comply with the general rules section.
- Class is open to 4 stroke turbo sleds from 660cc up to 1200cc with one power adder.
- The snowmobile must be equipped with a tether switch and cord that can be attached to the driver at all times when the snowmobile is started and/or running. This switch is in addition to the emergency shutdown button which also must remain functional.
ENGINE
- No Nitrous Power Adder is allowed.
- OEM and Aftermarket turbo/superchargers are allowed.
- Fuel injection allowed.
- Exhaust outlet must exit body in a rearward and downward direction not extending more than 3” from the snowmobile.
DRIVE
- Must have a twin opposed piston caliper braking system with a minimum 3/16 (.015 inch tolerance) inch thick; 7.0 inch minimum diameter brake disc, mounted on the drive axle. Any manufactured brake disc may be milled or drilled in the original pad contact area (all pads inclusive). The disc pad contact area may not be reduced more than 15% of the original pad contact area.
- A manufactured or modified original clutch guard, separate from the cowl, for the model primary clutch system must be provided and provide adequate protection from a primary clutch explosion that would cast parts in all directions. The guards must have sufficient mounting plates and reinforced with belting or meet approval of the Technical Director. The manufactured guard must be fully functional and mounted in the OEM location.
- Any CVT type primary and secondary clutch may be used.
- Clutches may be modified.
SKI SUSPENSION AND STEERING
- The ski suspension must maintain a minimum of 2 inches of travel with driver on snowmobile.
- Minimum ski stance is 40 inches.
- Ski suspension must have at least one hydraulic shock absorber on each side. Snowmobiles before January 1, 2006 are exempt.
TRACK SUSPENSION
- The suspension must maintain a minimum of 2 inches of travel and be OEM to the snowmobile.
TRACK & TRACTION
- Any commercially available rubber track allowed. No cleated tracks allowed.
- Any aftermarket track must maintain a minimum of 0.50 inch lug height. No other track trimming allowed.
- Minimum track width of 13.5 inches.
FRAME & BODY
- Full body Snowmobile, with all factory equipment on snowmobile.
- Long track rails and rail extensions allowed. Suspension components must remain OEM stock for the model. An approved tunnel enclosure must be added. Enclosure must be a minimum of .125” thick aluminum plate, extend a minimum of 2” behind the track, be the same width as the tunnel and installed such that the bottom of the enclosure is at the centerline of the rear axle and the rear provides a mounting surface for the rear flap.
IGNITION & ELECTRICAL
- Any ignition may be used. Electrical stutter boxes launch control and traction control allowed.
IMPROVED STOCK TURBO CLASS
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in Improved Stock Turbo class must comply with the GENERAL RULES SECTION
- Race Director shall have the authority to determine structural integrity and ability for safe and reliable race operation.
- The snowmobile must be equipped with a tether switch and cord that can be attached to the driver at all times when the snowmobile is started and/or running. This switch is in addition to the emergency shutdown button which also must remain functional.
ENGINE
- The following four stroke engines are allowed:
a. Arctic Cat 2 cylinder limited to 1056 displacement +2% over bore allowed.
b. Ski Doo 3 cylinder limited to 1170 displacement +2% over bore allowed.
c. Yamaha 3 cylinder limited to 1049 displacement+2% over bore allowed.
d. Yamaha 4 cylinder limited to 998 displacement +2% over bore allowed. - Can be fuel injected or carbureted. Only one venturi per cylinder.
- Air to Air intercoolers only. Intercooler can be aftermarket but must be air to air concept.
- No methanol injection allowed.
- All sleds must use an OEM Arctic Cat turbo charger PN 3007-806. The Arctic Cat turbo charger must not be altered or modified in any way to enhance performance.
- Any ignition allowed.
- Weight for sleds of this category is 775 pounds. Full body sleds are legal for this class. Weight may be adjusted at any time in interest of fair competition.
DRIVE
- A manufactured or modified original clutch guard, separate from the cowl, for the model primary clutch system must be provided and provide adequate protection from a primary clutch explosion that would cast parts in all directions. The guards must have sufficient mounting plates and reinforced with belting or meet approval of the Technical Director. The manufactured guard must be fully functional and mounted in the OEM location.
FRAME AND BODY
- Any chassis alterations, additions or removals, which alter stock appearance or dimensions, are not allowed. Tunnel can be repaired but must maintain OEM length.
- The OEM fuel tank must be the only tank that can be used for fuel supply. Oil injection tanks may not be used as a fuel tank.
- Removal of any insulation that alters the outside stock appearance is not allowed.
- Any hood or side panels that maintain stock appearance (as defined) for the make and model may be used.
SKI SUSPENSION AND STEERING
- Any aftermarket rear suspension shock may be used, but must resemble the production shock in approximate overall body length, body diameter, and mounting eye overall length.
- Ski stance must be OEM for the model.
- (Grass, Ice and Snow Drags only) Must maintain a minimum of two (2) inches of remaining compression travel with driver on snowmobile.
- Any OEM handlebar for the brand may be used.
SKIS & SKI RUNNERS
- Aftermarket skis allowed. Skis must be commercially available and marketed through normal sales activity. Minimum aftermarket ski length must be 40 inches
- Ski width may not be trimmed. Skis may not be interchanged between brands.
- Lower ski surface must remain OEM.
TRACK SUSPENSION
- OEM for the model suspension must be used. Suspension may be moved up and down in the tunnel (limit 3 inches). OEM location must be maintained and may not protrude beyond tunnel configuration.
- Must maintain two (2) inches of downward compression travel with driver on snowmobile.
- Any aftermarket rear suspension shock may be used, but must resemble the production shock in approximate overall body length, body diameter, and mounting eye overall length.
- Any size, material, and number of rear axle idler wheels allowed. Unless specified, no modification to chassis or suspension allowed to accept idler wheels. Rear axle may be moved upward in the slide rails to accept larger rear idler wheels.
- Commercially available long track rails and rail extensions allowed. To facilitate installation of long track rails, suspension may be moved up or down in the tunnel (a limit of three inches). The front torque arm must be OEM stock and located in the stock location on the slide rail. Rear torque arm must remain OEM stock for the model and may be relocated to accommodate the longer track and rail assembly. Suspension components must remain OEM stock for the model.
Tunnel must be extended to accommodate the longer track and suspension. - An approved tunnel enclosure must be added. Enclosure must be a minimum of .125” thick aluminum thick, extend a minimum of 2” behind the track, be the same width as the tunnel and installed such that the bottom of the enclosure is at the centerline of the rear axle and the rear provides a mounting surface for the rear flap.
TRACK & TRACTION
- Any commercially available one-piece molded rubber track allowed. Track must be race designated by the molder of the track. No cleated tracks allowed. Unless specified, no modification to drive, frame or suspension allowed to install track.
- Commercially available long track rails and rail extensions allowed.
- Track must remain untouched (no trimming).
- Minimum lug height from the flat of the track is 0.50 inch; the maximum lug height of a replacement track is 1 1/2 inch.
- Snowmobile must maintain a minimum of twenty (20) inches of track length on the course surface when snowmobile is under full power.
4-STROKE TURBO MAX CLASS
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in 4-Stroke Turbo Max class must comply with the general rules section.
- Class is open to 4 stroke turbo sleds from 660cc up to 1200cc with one power adder.
- The snowmobile must be equipped with a tether switch and cord that can be attached to the driver at all times when the snowmobile is started and/or running.
This switch is in addition to the emergency shutdown button which also must remain functional.
ENGINE
- No Nitrous Power Adder is allowed.
- OEM and Aftermarket turbo/superchargers are allowed.
- Fuel injection allowed.
- Exhaust outlet must exit body in a rearward and downward direction not extending more than 3” from the snowmobile.
DRIVE
- Must have a twin opposed piston caliper braking system with a minimum 3/16 (.015 inch tolerance) inch thick; 7.0 inch minimum diameter brake disc, mounted on the drive axle. Any manufactured brake disc may be milled or drilled in the original pad contact area (all pads inclusive). The disc pad contact area may not be reduced more than 15% of the original pad contact area.
- A manufactured or modified original clutch guard, separate from the cowl, for the model primary clutch system must be provided and provide adequate protection from a primary clutch explosion that would cast parts in all directions. The guards must have sufficient mounting plates and reinforced with belting or meet approval of the Technical Director. The manufactured guard must be fully functional and mounted in the OEM location.
- Any CVT type primary and secondary clutch may be used.
- Clutches may be modified.
SKI SUSPENSION AND STEERING
- The ski suspension must maintain a minimum of 2 inches of travel with driver on snowmobile.
- Minimum ski stance is 40 inches.
- Ski suspension must have at least one hydraulic shock absorber on each side. Snowmobiles before January 1, 2006 are exempt.
TRACK SUSPENSION
- The suspension must maintain a minimum of 2 inches of travel and be OEM to the snowmobile.
TRACK & TRACTION
- Any commercially available rubber track allowed. No cleated tracks allowed.
- Any aftermarket track must maintain a minimum of 0.50 inch lug height. No other track trimming allowed.
- Minimum track width of 13.5 inches.
- Traction devices allowed.
FRAME & BODY
- Full body Snowmobile, with all factory equipment on snowmobile.
- Long track rails and rail extensions allowed. Suspension components must remain OEM stock for the model. An approved tunnel enclosure must be added. Enclosure must be a minimum of .125” thick aluminum plate, extend a minimum of 2” behind the track, be the same width as the tunnel and installed such that the bottom of the enclosure is at the centerline of the rear axle and the rear provides a mounting surface for the rear flap.
IGNITION & ELECTRICAL
- Any ignition may be used. Electrical stutter boxes launch control and traction control allowed.
KING OF THE HILL CLASS
GENERAL SNOWMOBILE REQUIREMENTS
- All snowmobiles competing in King of the Mountain class must comply with the General Rules Section.
- Snowmobiles must meet all safety requirements for their base class. If a snowmobile has no base class it will be assessed by the tech director on an individual basis.
- Must Have Tether and Tek Vest