Every one I have seen has been after high speed runs. Most of my guys run these things down county roads to check sprinklers/fence etc. That is why I think it is high speed that melts the rollers.
Yep. changed the motor. LOL. No more wet clutch or rollers to deal with.
What we were finding was just the opposite of what you are saying. We could not get enough air to the cvt in high range due to the clutches not spinning enough rpm for the sheaves to move enough air. We found that if we used low range the sheaves would move enough air from the higher rpm to keep the rollers cool enough. We were not going as fast as you guys should be on dirt roads though I would think.
Question for you though. Do they slow down from their high speed run and stop and shut it off right away? If it were me I would let it idle for a bit to keep air moving and that might sovle your melting problem.
One key point is at high speeds where the rollers stay engauged in the same spot they can get to hot. If you vary your RPM the rollers can have a change to roll to a different point of contact.
I just ordered 2 new stock rollers for my 650. i had 2 rollers with flat spots, all others appear fine. Is that what you consider "melting" or do I have a different issue? My understanding is that roller issues are generally heat related. Sounds like some of the advice provided to minimize roller damage makes sense.
Not sure if just the high speed would cause just 2 to get flat spots. There is just a lot of air at high engine speeds being moved by the sheaves. I could see gravity helping to flatten a couple. It would seem to me that 2 are gonna be on their side so they would not flatten. And so I don't know if their should be four flat or just two. I guess it would depend on how they where situated when the engine was shut down.
When I run full speed for a long stretch and come to a stop I like to let the car idle until the electric fan stops. It can take a few minutes but it allows the cooling system to catch up and the CVT temp to lower.
When I run full speed for a long stretch and come to a stop I like to let the car idle until the electric fan stops. It can take a few minutes but it allows the cooling system to catch up and the CVT temp to lower.
A somewhat related question - didn't think it was necessary to start a new thread.
As I had posted earlier, my 650 has 2 rollers with multiple flat spots. There didn't seem to be any clutching issues, performance was fine, but since I have it apart I decided to replace those 2 rollers.
The new rollers are 30mm diameter, the remaining 6 rollers are fairly true but slightly smaller in diameter, from around 29.5mm to 29.7mm. Is there a downside to not replacing all rollers? As I said, I was satisfied with the performance while using 2 out of 8 rollers with flat spots - so why spend nearly another $100 ($13/piece)?
You would be fine just buying 2 rollers.
You could even go with 2 red 19g. rollers just put them directly across from one another.
I had 4 blue and 4 red in my 650 big bore.
08 and It had no top end to begin with soooooo.
1000cc swap was born.
I don't want to give miss information but I think I posted up in the clutching sticky most of my results.
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