850 Belt toast. 384 miles. Low snow.

[phatboy07]

Sled is a 850 163 3 inch. 384 miles and I Have not been able to make it to the the mountians yet so I have been riding around home. Snow is nowhere near what the mountians would be but it’s deep enough to ride in without wrecking the track. Went to add a new SLP primary spring and adjustable weights tonight and found the stock primary spring broken, and when I inspected the belt I found a crack/hole on the underside of the belt in the middle of the lugs. I was running 72 g weights (Polaris) and getting 8400 ish rpm (out of break in). It did drop to 8150-8200 ish Last 2 rides which I now equate to the broken primary spring (maybe?) I have attached a picture of the belt. I’m curious if anyone has any insight or anything I should check as I don’t think the belt should be down after 384 miles of low snow running. Could the broken primary spring or bing under weighted have affected the belt?

 

[Davajn]

Feels like that belt could be warrantied. Have had some odd belts warrantied so just talk to your dealer.
Belts tend to have some failure rate that aint connected to "bad abuse".

Nothing is perfect in this world

 

[2XM3]

Interesting on the spring, 3rd one i've heard of broken with low miles on it...wonder if they got a bad run of them?

 

[Jaynelson]

See the dealer try and get the broken spring warrantied...decent case to be made that the belt blew when the spring broke

 

[AdrenalineAddict]

It looks to me like that it may have been a belt deflection issue. If your belt is overly tight it will heat the inner side of the belt, especially at idle. It looks like you overheated the belt at idle and cooked it, sometimes they will squeal to let you know, other times not.