2006 Grass Drags Rules

General

• Tethers required on all machines (except Minis and Vintage)
• Limiter straps allowed in all classes
• All classes require 2 inches of remaining compression travel with the driver in place
• Cleated tracks are not allowed; except in Vintage – must be an OEM cleated track
• All picked tracks in Improved Stock, Pro Stock and Modified require tunnel enclosure
• Drivers require appropriate footwear (no sandals) and full-length pants
• Must have snow flap
• Cleaning out or spinning of tracks only allowed on stand with backboard
• Must have hoops on ski tips


• A scale will be present at these races –
• In Trail Stock and Stock -  Driver and gear weight must be 200lbs including fuel.  For example, if you have a dry weight machine of 470 lbs, it has to tip the scales at 690 lbs.

 

• Please note that if you are a light rider and will have trouble making the 200lbs – you need to bring fuel, or weights that can be secured on to the sled to make up the additional weight.  If more than one racer is using the same sled and there is considerable difference in weight, you need to make sure the sled is 200 lbs over dry weight, even with the lightest rider on it
• In Trail Stock Improved and Stock Improved the sleds and drivers combined weights must be as follows:
• 600cc – 700 lbs (3 cylinder) or 625 lbs (2 cylinder)
• 700cc – 750 lbs (3 cylinder) or 675 lbs (2 cylinder)
• 800cc  and 1000 cc – 775 lbs (3 cylinder) or 685 lbs (2 cylinder)

 

• Pro Stock, Open Modified and Heavy Modified will run by ISR guidelines

 

• Scale will be used in all classes except Womens, Junior, Junior Novice, Mini Sled, Stock Mountain, Modified Mountain, and Vintage

   

• Drivers in all classes, except Mini, Junior and Junior Novice must be 16 years old or older
• If there are any questions about rules not stated here – refer to International Snowmobile Racing (ISR) rules.

Class Specifications




Unique Sled Rulings:

• Yamaha Attak, Rx 1 and Artic Cat 660 are classed as triple piped machines and can’t run in 600s or  700s classes
• Polaris 750 Turbo may enter 500 class
• ANY modifications to the stock turbos and the machine can only run in Open Modified 1000 and King classes
• Yamaha Vector, Rage, Nytro, Phazar may all run in the 500 class
• Turbo Yamaha may run in Open Modified 1000 and King, and must wiegh 625 lbs




Trail Stock (including Womens, Junior and Junior Novice):


Must have OEM (or factory designed replacement) engine, hood, frame, cowl, gas tank, carburetion, suspension and variable speed converter
No component ofthe engine may be altered; this is to include polishing, port matching or blueprinting
No changes in engine dimensions can be made by gasket adjustments
Maximum cylinder overbore for wear cannot exceed 0.020 inches (0.5 mm)
No carb modifications
No additional fuel pumps
Oil injection pump must remain functional
Exhaust system must be stock, complete and unaltered (Stingers are allowed)
Air box can be replaced with after market filter. Air boxes cannot be modified
Any springs or weights may be used, after market helixes are allowed
Track sprockets/drivers must remain OEM for the model
Track changes allowed but no grass drag tracks, cutting or porting of tracks
OEM shocks must remain in place
No traction products
No chassis or suspension alterations
Marginal snow wheels and related hardware may be added orremoved from the slide rails
Rear idler wheels must remain OEM
After market skis are allowed


Stock:


Anything allowed in Trail Stock is allowed in Stock
Traction products, with proper guarding, allowed

 

Trail Stock Improved:


Any alterations allowed in Stock allowed in Improved
Must have OEM engine, belly pan, fuel tank and frame,
Any hood that maintains stock appearance is allowed
Engine modifications allowed, with no more than 1 % overbore, no strokers
Engine modifications must be done from original casting
No pressurized fuel systems allowed
No turbos or blowers
No open pipes
Air box may be removed; oil pumps may be removed
Carbs and flanges must be OEM
Reed changes and shorty covers allowed
Commercially available, aftermarket heads allowed
No traction products, no trimming of track Drop and Roll allowed


Improved Trail Stock 1000:

Same as improved except:
Stroke may be changed
After market cylinders allowed (must be commercially available)




 

Stock Mountain:


Same as stock, but must have a 1 ¾ " or 2" track 136" or longer
Any commercially available track allowed
No cutting oftracks except to clear heat exchangers


Modified Mountain Class:


Any modifications allowed in Stock, Improved or Pro Stock allowed in Mountain
Must have a 1 3/4" or 2" track
Hood may be removed
Must have belly pan and clutch guard
No bolt on traction products
No trimming of tracks, except to clear heat exchanger
Track porting allowed
Fuel tank must be from stock qualified snowmobile
Turbos and nitrous allowed


Pro Stock Class:


Any alterations allowed in Stock or Improved allowed in Pro Stock
Must have stock belly pan and stock appearing seat, hood and tank
Must have stock appearing chassis
Any tracked suspension is allowed
Traction devices are allowed. No screws
If traction products are used, must have wrap around safety shielding
All carb changes are allowed
Maximum of 2% over cc displacement for class is allowed
If plate is used to raise cylinders, can be no more than 0.5 inch thick No super charge, turbos or pressurized fuel systems
Head changes allowed
Strokers allowed
Any ignition allowed in 800 and 1000
Pro Stock Clutch Guard required on Pro Stock Machines

                                            

Open Modified Class:


Must have 360 degree clutch covers or belly pan and clutch cover
If traction products used, wrap around shielding is required


Heavy Modified Class:


Naturally aspired machines only
Minimum class weight is 550 lbs combined

 




Women's Class:

         TRAIL STOCK  machines only


Vintage Class:


             Machines must be 15 years or older
             OEM cleated tracks will be allowed


Mini Sleds:


                  Kitty Kats, Mini Z's and the like
                  Free registration
                  Parental Consent must be signed


Junior Class:


         600cc TRAIL STOCK machines and under only drivers must be 14 - 16 years of age
         Parental Consent must be signed


Junior Novice:


      400cc or smaller TRAIL STOCK machines
      drivers must be 10 - 13 years old
      Parental Consent must be signed




 

 

 





Download a printable version of the rules ( PDF)

 

Download a printable version of the Entry Form ( PDF)

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