So, I dug out the belt/sheave gauges to check belt angles on multiple belts.
OEM and Non-OEM. Belt angles were anywhere from 26* to 30* on any given belt. I also measured belt widths with my 28* caliper, they are not close to their advertised spec. Now you can see were proper breakin is mandatory. Letting the belt to sheave angle get a match.
You don’t want to go down the road of the perceived sheave angles. You would be amazed.
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What elevation are you riding at?I've been having lots of RPM issues on my sled this winter (amongst other issues) and I believe my dealer figured out this issue finally.
This is a 2021 850 khaos 155 with the "low elevation clutching" . Would only pull 7200 on groomed trail with 3 inches of powder on top. Let off and get on it and the rpms would go to 7400, then slowly climb to 8, maybe. Seemed to actually pull better when loaded, like climbing a hill. My dad has the same sled in a 165 and I jumped on that thing back to back and it would pull right to 8150 and stay there. Both are stock.
We ended up going back to the 42 straight cut helix and SLP blue/pink spring. Huge improvement on my sled. Might try a different secondary spring for more backshift.