I'll start off by saying I'm a clutch rookie. Anyways while replacing the belt, i reinstalled the primary and engaged the clutch to make sure everything was the same. Something wrong with the primary and upon disassembly, one of the weights had broken and several others were flat spotted. I'm sure the weight moved during removal and broke during the test run, even though I didn't go above half throttle. But is clutch weight wear common even with ample grease? Never had mud or water in the clutch area or never slipped a belt. 07 700 with about 9000km and almost all with tracks.
Do clutch weights wear?
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309 Posts
With grease and its round design I would anticipate very little wear. Are you saying you think it wore during the reassembled test run? Or that it wore during the 9000km and it’s been reassembled differently then the previous wear pattern, causing everything to be out of balance? (Because I would assume the latter.)
But technically speaking, EVERYTHING wears. Unless of course, it’s made with Unobtainium which is frictionless, does not generate heat, doesn’t wear, and has an ideal specific gravity!
-Opie
But technically speaking, EVERYTHING wears. Unless of course, it’s made with Unobtainium which is frictionless, does not generate heat, doesn’t wear, and has an ideal specific gravity!
-Opie
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5,712 Posts
Flat spots are common to happen on the older weights, and especially common to happen in clutches without proper maintenance.
If you have never serviced your clutch in 9000 kilometers, thats poor maintenance.....and 9000 kilometers is actually a lot of kilometers.
For the broken weight, that happened when you changed the belt. The clutch sheave got pushed in some, this allows the weight to fall out of it's channel. Once everything is put back together, the weight is crushed and breaks.
Don't worry too much about it. That happens quite a bit. Your not the first, nor will be the last.
Get some new weights. Do a complete primary and secondary clutch service....and get back to riding.
Just an FYI. I service my primary clutch at least once a year, no matter how little or often the use.
I'll service the secondary if I feel I need to....but I recommend no more than 2500 kilometers between servicings.
If you have never serviced your clutch in 9000 kilometers, thats poor maintenance.....and 9000 kilometers is actually a lot of kilometers.
For the broken weight, that happened when you changed the belt. The clutch sheave got pushed in some, this allows the weight to fall out of it's channel. Once everything is put back together, the weight is crushed and breaks.
Don't worry too much about it. That happens quite a bit. Your not the first, nor will be the last.
Get some new weights. Do a complete primary and secondary clutch service....and get back to riding.
Just an FYI. I service my primary clutch at least once a year, no matter how little or often the use.
I'll service the secondary if I feel I need to....but I recommend no more than 2500 kilometers between servicings.
Thanks. Everything was working 100% before the belt change, so the roller moved during instal. The clutches were serviced by the dealership every couple thousand km, or so they say. I'll get some weights and service them now that I know how it all works. Any specific moly grease to use?
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The guy that installed my sheave for me, has probably done 50 of them. Said mine at 1400 miles was the best looking one he'd seen other than one straight from the showroom floor. Grease was clean and in perfect condition. And even with that, my stock rollers still had flat spots that had already developed.
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9,912 Posts
megrizzly...I feel that using grease contributes to flat spots on the roller weights.
The CVT have an air induction system to cool the CVT components, mostly the belt. During dusty rides dust and grit gets sucked into the CVT. I have found BB size pebbles in the CVT case.
The primary does have a grease cap on it to corral all that grease. The cap may keep some of the crap out but as the primary slides in and out like a bellow that crap can and does get sucked into that mass of gooo. Proof is that after 1-2000 miles that gooo turns to a substance similar to asphalt.
That gritty gooo gets between the rollers and the sheave. The gooo also gets in front of the rollers like a wave hindering the rolling action of the rollers causing them to slide. Flat spots are the result as the alloy is harder than the plastic composite on the rollers.
The gooo also piles up at the outer edge of the sheave as it continues to get harder with more crap in it, it restricts the travel the rollers which restricts the top speed.
My unqualified 2.0162¢
Just a thought..?
The CVT have an air induction system to cool the CVT components, mostly the belt. During dusty rides dust and grit gets sucked into the CVT. I have found BB size pebbles in the CVT case.
The primary does have a grease cap on it to corral all that grease. The cap may keep some of the crap out but as the primary slides in and out like a bellow that crap can and does get sucked into that mass of gooo. Proof is that after 1-2000 miles that gooo turns to a substance similar to asphalt.
That gritty gooo gets between the rollers and the sheave. The gooo also gets in front of the rollers like a wave hindering the rolling action of the rollers causing them to slide. Flat spots are the result as the alloy is harder than the plastic composite on the rollers.
The gooo also piles up at the outer edge of the sheave as it continues to get harder with more crap in it, it restricts the travel the rollers which restricts the top speed.
My unqualified 2.0162¢
Just a thought..?
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