Shimming primary for proper belt to sheave on whatever clutching you run is imperative. I would advise this before any additional performance modification are added. If your not putting the power down properly stock, why add power that you already have?
This is the difference between a sled that "runs" and a sled that makes people go "WOW WHAT DOES HE HAVE DONE TO THAT THING?" The difference between a sled with .030" belt to sheave vs is .060" is noticeable to the rider. The difference of .030 and .120" is noticeable to an onlooker, it feels like taking off a belt with 1000 miles and putting on a fresh one.
Also, the quality and "snap" in your clutching is SOOO much better when everything is tight and in spec. Its really hard to describe how much better one all tight and aligned runs vs loose and improper setups.
This is the difference between a sled that "runs" and a sled that makes people go "WOW WHAT DOES HE HAVE DONE TO THAT THING?" The difference between a sled with .030" belt to sheave vs is .060" is noticeable to the rider. The difference of .030 and .120" is noticeable to an onlooker, it feels like taking off a belt with 1000 miles and putting on a fresh one.
Also, the quality and "snap" in your clutching is SOOO much better when everything is tight and in spec. Its really hard to describe how much better one all tight and aligned runs vs loose and improper setups.