Stock 90 clutching

[chunky0071]

OK let hear what would be my best clutching for a stock 90 ? We race mostly Xc with a few local Mx races . This is stock. Would like to see the bike little more respondsive if possible if not will just play around with and see what happens! Thanks for the help.

[jungleboy213]

I know we raced stock MX class all last year and found that 3.75 rollers and a 1500 ZTR torque spring seemed to work the best with a bone stock quad. I added a Stage 6 clutch, which really helped out alot. I don't know if you are allowed to have an aftermarket clutch or not, but in our stock class you couldn't change the carb, suspension or the exhaust. Other than that, it was fair game.