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It kinda looks like the stock mod class you can have a stroker crank for 2009 but not in 2010??? cause it says that you have a grace period to 2010



Here is the info of the website:



MM12 Stock/Mod-

This Class is for KLX/DRZ110, CRF70 and TT-R90 /110, Motorcycles Only. – Must be 18 years of age or older as of race date. The following items must remain “Bone Stock”: Engine cases, Engine head and cylinder (No AFTERMARKET aluminum heads allowed, no cylinder spacers allowed), carburetor (re-jetting is allowed. Choke must remain on carb), carburetor manifold, engine appearance (do not paint or coat cases), frame, swingarm, forks, wheels hubs (10” only front and rear), brakes, fuel tank. (Stock cylinder can be bored/ ONLY stock cylinders allowed!)

Bikes can be modified by changing or adding the following parts: Upper triple clamps, handlebars, grips, brake cable, throttle cable, kill-switch, throttle assembly, sprockets, graphics, tires, piston, rings, exhaust system, clutch springs and plates (clutch must remain fully automatic, NO manual clutches allowed) CDI box, air filter, fork springs, rear shock, chain, sprockets, foot pegs/mounts, skid plates, rims and spokes, shifter and brake lever, seat covers and foam, plastic (i.e.: fenders, shrouds, number plates can be replaced in color only- must have white backgrounds). Practice time TBD

NO “STROKERS” ALLOWED IN 2010!

STROKE WILL BE CHECKED AT TECH INSPECTION IN 2009 WITH A GRACE PERIOD UNTIL MMSX 2010
 
damn the Z class looks dope i just might have to make the trip for that. Seems like it would be mad fun. How you guys think they will check the stroke of the motors? there something you can put in the plug hole to check that?
 
why not use use stock displacement in the stock class. I dont see why they bother calling any class a stock class if they dont put displacement limits on. Thats where they needs to focus rules put displacement limits on. just flustrating. glad the rules at the tracks i have been to are vastly different.



after reading more of their rules they seriously need to have different ppl make the rules. like the Z class u cant have spokes? why? if you can find an 8" rim to run spokes why not. dumb rule



Paxracing said:
Why not stroke the stock crank.
 
So according to what I read. There are no modifications to a stock mod engine except a bore in kit with the OEM cylinder.

It says the head, cases, manifold and carb must remain "bone stock" so anyone with a ported head or intake manifold will be DQ'd



These rules are different from the original ruling of you can do what ever you want as long as it looks stock from the out side..





Good times. I'm tearing everyone down.
 
personally i think that is dumb. If they are gonna have all these rules, they might as well have it stock head but can have an aftermarket cam, stock 50cc discplacement, stock crank it would be alot easier that way and the rules are so contradicting as is its stupid
 
dood said:
So according to what I read. There are no modifications to a stock mod engine except a bore in kit with the OEM cylinder.

It says the head, cases, manifold and carb must remain "bone stock" so anyone with a ported head or intake manifold will be DQ'd



These rules are different from the original ruling of you can do what ever you want as long as it looks stock from the out side..





Good times. I'm tearing everyone down.


"Hey Mike look free booze" - Brad

*wheels stock/mod bikes past inspection*
 
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