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I have a 2001 Polaris Trail Boss 330, with a Arctic Cat Spirit 500 snowmobile engine I swapped in (About 40-50hp). I'm running the bone stock Polaris 330 clutches. It pulls great off the line, but doesn't shift up as quickly as it should. RPM feels too high. I'd like to swap the primary weights out with heavier ones to help with this. The stock weights are Polaris Part #5630709, "10RH". I did some digging around, and I'm having trouble finding what these stock ones currently weigh, and how much heavier I should go. Suggestions?

Thanks!
 

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Take them to the post office, or get a gram scale off ebay for about $10. The Polaris 10 series weights work great all around and are cheap and easy to find. I don't have a listing for those weights in any of my manuals that I can find anyway.
 
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