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Very Active Member
Can RPMs indicate CVT belt wear???
Went to Mt Charleston this morning with Vrod friend.
Did not feel cool until 7000 feet, before 8 AM.
Going over Deer Creek Road, from Lee Canyon to Kyle Canyon, it was friend's turn to lead.
We were at a leisurely pace and I decided to compare RPMs versus speed.
Up a moderate grade, throttle steady, under load, but not accelerating, there seemed to be a consistent correlation between RPMs and speed between 40 - 50 MPH, especially 45 - 50 MPH.
For example 44 MPH would read 4400 (sometimes 4500 RPM). Above a certain RPM, it updates only in hundreds.
Chris56 commented, in another thread, that 108 MPH was 8250 RPM, whereas mine at 107 MPH reads 8000 RPM and a soft rev limiter intervenes.
I asked him in that thread how many miles/kilometers on his CVT belt.
My thinking is that if he is running 250 RPM more for only 1 MPH more, his belt width may have worn, causing the belt to rider lower between the primary clutch sheaves for the same engine RPM.
At 3000 miles (almost 3 months), my 2020 is 1/4 to the recommended belt change interval of 12,000 miles. Since most of my riding is distance, I am hoping to go longer than that.
So, I am wondering if, under the same conditions (perhaps altitude, ambient temperature included), if the RPM display is reading higher RPMs for the same speed, will that give me some indication of belt wear? The 2019 owner's manual indicates 3 mm wear will affect performance.
Preliminary research indicates a BRP 417 300 571 belt.
https://shop.sknorthwest.com/fiche_s...ection=3011135
If that is correct, it is a VERY durable belt per this link:
https://www.ibackshift.com/article/belt-143.asp
See also PAC bulletin 2019-7 improved belt
https://www.ski-doo.com/content/ski-...t-updates.html
https://www.dootalk.com/forums/topic...elt-417300571/
Pending verification by a Ryker owner with a service manual, belt specs are:
38.3 mm wide (1.507")
35.3 mm limit (1.389") based upon owner's manual of 3 mm max wear
This corresponds to the post by RykerUSA, reporting a belt change at 11,000 miles, with a width of 1.44" within spec.
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