Hey guys my friend has a 96 xlt 600 and he needs to know what spring to use to bring engagement down to around 3500-4000rpm? the weight had the numbers 10 and 58 written on them. he'd like to just get away with changing the spring. We are also rebuilding the primary clutch. Cause the engagement rpm got progressively higher until it would engage at around 6000 and it wouldnt engage smooth the outer clutch half would slap the belt until you revved it up a litlle higher. will a rebuild kit fix this?