[Canuck12345]

Thanks Sho305, I have done a fair bit of snowmobile clutching and get what you are saying.

I really like the idea of a bushing inside the primary to limit the closing as this will not be effected by the rotational forces.

I will be looking around now for a heavy primary spring to keep the rpm up and a new secondary spring wound up tighter than stock to reduce the opening.

Thanks everyone!