850 patriot will not rev past 8100

[indydan]

Centrifugal forces exerted clamping the belt by the flyweight at a given position in the primary clutch travel: Is calibrated to match a certain resistance (spring and helix angle) in the secondary.

When those points on the two graphs are offset by the belt being “effectively” longer while the center to center of the clutches has NOT changed………..

Performance suffers.

Every single “clutching guru” I’ve ever had discussions with or read books from all stressed the importance of belt deflection.
Dynamo Joe (skidoo)

Indydan (polaris)
Roosterbuilt (skidoo)
TRS (polaris)
Olav Aaen (old school)

I’ve seen and felt the proof in the pudding.

Hopefully you find some great snow and test it like crazy. ?

Think of this:
Why does your performance suffer when a belt is worn out? (But not glazed)

The narrow belt mimics loose deflection…….

Or loose belt deflection mimics worn out belt?
View attachment 380644

This was really well said

belt deflection is far more complex then then it seems