2005 Season NEGDS PRO “Super Stock Twins” Classes 

since the 2003 race season NEGDS introduces 4 new classes which will replace the N.A. Improved Twin classes. The new “Super Stock Twin” classes follow the same basic rules as the ISR Improved stock classes but with some refinements and weight breaks.

Super Stock Twin 600 Minimum weight driver & sled 650 lbs.

Super Stock Twin 700 Minimum weight driver & sled 675 lbs.

Super Stock Twin 800 Minimum weight driver & sled 700 lbs.

 Super Stock Twin 1000 Minimum weight driver & sled 725 lbs.

·      Long track kits allowed, must be OEM parts as purchased at dealer.

·      Like engine in its brand chassis, must be within 10 years of manufacture.

·      Aftermarket cylinders allowed.

·      Aftermarket and externally modified crankcases allowed as long as they meet OEM external specifications.

·      Maximum overbore of 2% over class cc limit

·      Maximum overbore of 5% over class limit in the 1000 class. (1050 cc)

·      ISR approved clutch guards mandatory.

·      ISR approved tunnel enclosures mandatory.

·      Sled movement form stock classes (Pro division) to SST classes not required to have Improved stock clutch guard or tunnel enclosure and must meet the ISR stock filed weight rules for the make and model sled. 

Amateur “Super Stock Twins” Classes 

Since 2003 NEGDS has 4 new “Amateur Super Stock Twins” classes (A/SST) These 4 new classes are for twins cylinder sheds only and will follow our regular amateur based rules. Sleds competing in these classes may be amateur improved and will adhere to those rules.

Amateur Super Stock Twin 600

Amateur Super Stock Twin 700

Amateur Super Stock Twin 800

 Amateur Super Stock Twin 1000

·        Sled must be OEM filed sled (engine & chassis) for year, make and model.

·        Must weigh ISR filed weight for year, make and model.

·        Maximum cc’s is the class limit.

·        Sleds must maintain 3” of front suspension compression travel (as measured at the front bumper)

·        Rear suspension must maintain 3” of rear compression travel (as measured at the rear bumper)

·        No front suspension tie downs or suspension limiting devices.

·        Tracks must be OEM for year, make and model or an ISR filed replacement track as listed in the ISR yearbook.

·        Hi-fax (suspension slides) is mandatory.

·        The standard stud height rule applies to these classes (3/4” above the track lug)

·        Air box, air filters or open carburetors optional.

·        Sleds must adhere to all general rules as stated in the ISR yearbook.