http://cgi.ebay.com/ws/eBayISAPI.dll...909297191&rd=1

There is a clutch tuning manual currently on Ebay

For someone that would like to understand how there cvt works and what they are acctually doing to them with spring and weight changes.

 

Is there a major difference between snowmobiles and atv's??

 

All the basic principals will apply to both. The snow clutches are physically larger for more initial underdrive and more overdrive. The book is truly worth the money for the person who likes to tune his/her own machine.