98srxrider
Member
Is a light weight brake rotor allowed in the improved stock class?
YAMMIEGOD3:16
Active member
I AM GONNA SAY NO. I WILL CHECK MY ISR RULE BOOK THOUGH. !! 3:16 (yammie tony)
i think long as it starts out as a stock part.i think that is the way it used to be anyway.i could be wrong though.
Last edited:
98srxrider said:
There was one on the sled I bought from Allen Ulmer which was an improver
YAMMIEGOD3:16
Active member
THEY COULD BE LEGAL IF THE SLED IS WITH,IN WEIGHT. GOOD QUESTION. 3:16 (yammie tony)
blueracer
New member
IMPROVED STOCK CLASS
Engines
Same rules allowed in stock class with only the following changes.
Crankcase and cylinder porting allowed
Any compression ratio allowed.
Only internal head modifications allowed.
Any silenced exhaust system allowed.
Any reed/cage, rotary valve and or intake length change allowed.
Carburetor boring and divider plates allowed.
Oil pump can be disabled.
Air box modifications/air filters/stacks or no air box allowed.
Additional fuel pumps and impulse lines allowed.
Timing changes including offset keys allowed.
CDI boxes can be altered or substituted from another model or year sled.
Engines may be bored up to a class limit.
Drive
Any drive sprocket allowed.
Any gear/chain allowed. Any combination of clutches or machining allowed. Wave and aftermarket brake rotors allowed. No lightweight shafts allowed.
Track & Suspension
Suspensions must be original for model.
Same track and suspension rules as stock class, except any idler wheel allowed.
Chassis
The same rules as stock class apply with the following additions.
Environmentally friendly lube system allowed.
Heat exchangers may be relocated or modified or substituted.
Aftermarket engine mounts allowed.
Torque arms allowed.
Original fuel tank must be utilized. Additional fittings allowed.
No lightweight components, including hood, seat, trailing arms, spindles, a-arms or radius rods. No lightening holes allowed.
Access openings for component accessibility such as pipes or clutches allowed.
Engines
Same rules allowed in stock class with only the following changes.
Crankcase and cylinder porting allowed
Any compression ratio allowed.
Only internal head modifications allowed.
Any silenced exhaust system allowed.
Any reed/cage, rotary valve and or intake length change allowed.
Carburetor boring and divider plates allowed.
Oil pump can be disabled.
Air box modifications/air filters/stacks or no air box allowed.
Additional fuel pumps and impulse lines allowed.
Timing changes including offset keys allowed.
CDI boxes can be altered or substituted from another model or year sled.
Engines may be bored up to a class limit.
Drive
Any drive sprocket allowed.
Any gear/chain allowed. Any combination of clutches or machining allowed. Wave and aftermarket brake rotors allowed. No lightweight shafts allowed.
Track & Suspension
Suspensions must be original for model.
Same track and suspension rules as stock class, except any idler wheel allowed.
Chassis
The same rules as stock class apply with the following additions.
Environmentally friendly lube system allowed.
Heat exchangers may be relocated or modified or substituted.
Aftermarket engine mounts allowed.
Torque arms allowed.
Original fuel tank must be utilized. Additional fittings allowed.
No lightweight components, including hood, seat, trailing arms, spindles, a-arms or radius rods. No lightening holes allowed.
Access openings for component accessibility such as pipes or clutches allowed.
98srxrider
Member
Thanks for the replies
so if i have an aftermarket track say from camopast, im not allowed to run in improved stock?
valin
Active member
Yes, you are. Any track is allowed, providing it has not been modified, and meets the minimum lug height.
YAMMIEGOD3:16
Active member
GUY HERE DON,T LIKE MISPELLING. SORRY 05VMAX.05vmax said:
camopast - camoplast 3:16 (yammie tony)
thats ok tony. thats why im a dumb truck driver and not a school teacher. i'll try to do "batter" lol.
YAMMIEGOD3:16
Active member
HEY IF YOUR A DUMB TRUCK DRIVER WHATS MY EXCUSE. A OLD RETIRED GM WORKER WHO HAS NOT BEEN IN SCHOOL FOR THIRTY FIVE YEARS ? lol. 3:16 (yammie tony)