This is the one that i am using. It makes it wind up much faster.
[link]http://www.gpmracing.us/index.cgi?partnumber=NRS410007M&c=148[/link]
I run that racing cluch with it set on the highest rpm setting. The flywheel is just a little bit bigger than the clutch bell.
You can use your factory flywheel with that clutch as well. You dont have to get a different flywheel.