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Clutching Question 2009 Assault

K
Nov 24, 2016
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I have been reading a lot of info on clutching (Info overload) and am not sure I found what I was looking for. My sled (09 Assault) is only getting about 65mph it spins 8200-8300 rpm but the belt is not getting to the top of the clutch. I marked it with a sharpie, it’s about one inch from the top. Everything is stock with 66gm weights. I took the both clutchs off and apart to make sure nothing was binding, all good. Only 900 miles on sled. Could the primary spring be the culprit, would going to the 140/310 help?

Quick note; it get to 65 fast.
 
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