I read an article in dirtwheels mag about LTZ 90 modifications. Does anyone know where to get a high performance clutch to go woith the new CDI box, Exhaust & air filter. Any help would be greatly appreciated. Thanks

 

Welcome to the forums.
There is a spacer in the front clutch that gives more speed when removed.
Clutchs won't do anything to improve performance. I doubt the mods listed will give that much. If anything, simple clutch tuning may be needed (different roller weights).
I like the Yoshimura pipe for the Z90.