Join Date: Sep 2004
Years Riding: all of them
How you found us: a real person
Incase anyone is wondering what the ASRA/CCS Thunderbike rules are:
6.5 THUNDERBIKE - Thunderbike machines, except single cylinder machines, are based upon production models, sold by manufacturers and their dealers in North America for street use. Proof of compliance rests with the competitor entering the motorcycle. Single cylinder machines are exempt from production and street use requirements. Single cylinder 2 stroke GP road race machines are not allowed in this class. All machines must have unaltered VIN numbers.
NOTE: Ducati 749 Series machines are excluded from this class.
6.5.1 Production machines not sold by manufacturers and their dealers for street use in North America via normal commercial channels may be approved on an individual basis. CCS will maintain a list of non-standard approved models and that list will be available at each event from the Race Director/Referee.
A. CCS reserves the right to re-factor machines at any time. CCS will notify
current licensees 30 days prior to any change. Changes will take effect 30 days from the original date of notification.
6.5.2. All machines must meet the equipment standards of Section 5, as well as the following:
A. Frame, cylinder head(s) and engine cases must be from the same production model motorcycle. Single cylinder motorcycles may use any frame and engine.
B. The frame must be as originally supplied by the manufacturer on the approved model. Strengthening gussets or tubes may be added. Only brackets or tubes not supporting suspension, engine, or drive line components may be removed. Swing arms may be modified or replaced and rear shocks may be replaced or relocated. Single cylinder motorcycles are excluded from this restriction.
C. Reducing engine size of machines from stock displacement to meet Thunder class displacement limits is not allowed.
D. Fairings that meet the requirements of Section 5 may be used.
E. Liquid cooling is not allowed unless original equipment on the model being used.
F. Original type of induction system must be retained. If a machine originally was sold with fuel injection, then it must remain fuel injected. If the machine originally came with carburetors, then it must use carburetors, however they need not be the original type or size.
6.5.3- CCS Thunderbike Class displacement limits are absolute and are set as follows:
THUNDERBIKE (Amateur and Expert)
Single cylinder, Unlimited displacement
Two stroke, Unlimited displacement
Twin cylinder, air cooled, Unlimited displacement
Twin cylinder, liquid cooled, 3 or less valves per cylinder, Unlimited displacement
Twin cylinder, liquid cooled, 4 valve per cylinder, up to 750cc
Three cylinder, air cooled, non-fuel injected, up to 1200cc
Four cylinder, air-cooled, up to 1200cc
Four cylinder, liquid cooled, 1990 to 1992 model year, up to 650cc
Four cylinder, liquid cooled (oil or water), pre-1990 model year, up to 860cc
All air-cooled, 2-valve, unlimited displacement
"I pity the poor people who don't ride motorcycles"
-Malcolm Smith, champion motorcycle racer