Clutch spring

minus40 · Mar 27, 2015

What would cause primary springs to deform in as little as 50 miles on a new clutch. New Polaris springs go in straight and come out with quite a lean on them. I could tell when one was out of shape as the rpm climbed a little as the spring was binding on the spider lock nut. Lots of alum filings as well from both spring pockets.

sled_guy · Mar 30, 2015

Check that clutch closely in a couple of areas...
1 - The shims under the spider. Make sure you don't have one hung up keeping the spider from screwing all the way down in to place.
2 - Make sure your towers and cover a lining up and bottoming out against each other.
3 - Make sure the clutch is screwed tight together, that the spider/moveable sheave can't/isn't spinning on the shaft.

Otherwise I don't know how they could tweak like that, they are pretty tight in the spring pockets typically.

sled_guy

minus40 · Mar 30, 2015

Thanks, that all checked out. Next step was to put a dial indicator on and check spring pads for square. Then balance. However a new one is on the way so might not waste anymore time on this one.

kanedog · Mar 30, 2015

Give Lonn at Thunder products a call. Let him know your problems and he will have what you need.

retiredpop · Mar 31, 2015

minus40 said:
What would cause primary springs to deform in as little as 50 miles on a new clutch. New Polaris springs go in straight and come out with quite a lean on them. I could tell when one was out of shape as the rpm climbed a little as the spring was binding on the spider lock nut. Lots of alum filings as well from both spring pockets.

It's because you're a Rider fan and it has to lean like your avatar:face-icon-small-ton

minus40 · Mar 31, 2015

kanedog said:
Give Lonn at Thunder products a call. Let him know your problems and he will have what you need.

Are you thinking cover or glide washers?

minus40 · Mar 31, 2015

retiredpop said:
It's because you're a Rider fan and it has to lean like your avatar:face-icon-small-ton

:lol: Hmmm. Calgary huh :fencing:

CO 2.0 · Mar 31, 2015

What spring are you using? On my 12 pro I noticed poo, slp, and speedwerx h5 springs had thicker or thinner coils depending on brand, and would rub/stick on both ends. Ive run thunder products metal glide washers in my clutches for years now on Polaris and Cat primaries. Helps spring bind a bunch. I usually run one on each end of the spring. Each one will raise clutch engagement by 50 or more rpm fyi

kanedog · Apr 1, 2015

minus40 said:
Are you thinking cover or glide washers?

For the budget minded- glide washers
For the catsass- both.

minus40 · Apr 1, 2015

CO 2.0 said:
What spring are you using? On my 12 pro I noticed poo, slp, and speedwerx h5 springs had thicker or thinner coils depending on brand, and would rub/stick on both ends. Ive run thunder products metal glide washers in my clutches for years now on Polaris and Cat primaries. Helps spring bind a bunch. I usually run one on each end of the spring. Each one will raise clutch engagement by 50 or more rpm fyi

Polaris blue/white, black/white.
So your just running one plain steel on each end? I was thinking of one steel against the spring and the coated one under that against the clutch. Maybe that's overthinking it?
That will take up .080 in space. Is there enough room that you don't have to worry about coil bind? i suppose that will depend on spring and how tight the pocket actually is.

minus40 · Apr 1, 2015

kanedog said:
For the budget minded- glide washers
For the catsass- both.

Thanks, I assume you have to balance the assembly after the cover?

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Clutch spring

minus40

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sled_guy

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minus40

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kanedog

Undefeated mountain clutching champ of the world.

retiredpop

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minus40

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minus40

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CO 2.0

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kanedog

Undefeated mountain clutching champ of the world.

minus40

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minus40

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