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OK, I ran into a problem with my sled last year and I cannot believe I just remember it!!

There were a couple of times when I was running around 60 mph or more for a length of time, my sled would seem to down shift and the belt would no longer grab. The only way to engage again was to drop down to below 15 mph, then it would be fine again.

I switched belts and it still did it, one thing I found was some belt residue on the primary clutch that might have been causing it to slip. I did not run it enough after that last year to determine if that was the problem.

The weights and rollers are fine, they do not stick and there are no flat spots.

Could this be an alignment problem between my two clutches? Should I be looking at my secondary clutch?

This is on a 1997 zr580.

PS the spell checker is not working, so bear with me.

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Sounds like maybe secondary problems. Busted secondary spring maybe? Good cleaning might help also sounds like something is sticking and wont let the secondary sheaves come back together, thus taking tension off of your primary.
 

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That's exactly what i was thinking.

Like Codered said, your secondary spring could be broke. I'd check that first.
 
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