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Tech Information => General Help => Topic started by: Sledhead60 on January 30, 2018, 10:32:56 AM

Title: P85 clutch
Post by: Sledhead60 on January 30, 2018, 10:32:56 AM

Just wondering what I would need to have as far as spring color and weights for a Polaris p-85 clutch for it to run right on my 79 440 invader. Also, can I use the same drive belt and clutch bolt?

Title: Re: P85 clutch
Post by: F500-92 on January 30, 2018, 11:17:23 AM

I'm working on my P85 clutching at the moment as well

 Springs are difficult to say.  Every manufacturer measures spring rates differently.  I have about a dozen springs but no idea who made them.   Polaris purple is not the same as Aaen purple vs EPI purple.

 I did put them all on a spring rate rig and settled with a spring at a rate of 70lbs at 2.5" compressed height and 220lbs at 1.5" with Polaris 10-56 weights.  This combo ended up with perfomance very similar to the stock Kawi clutching.

I used the original belt and used the Kawi Clutch bolt with the Polaris clutch retainer washer.

Title: Re: P85 clutch
Post by: kawhead on January 31, 2018, 08:54:46 AM

how much material must be removed from the Polaris clutch to clear the vader bulkhead?

Title: Re: P85 clutch
Post by: sprocket on February 01, 2018, 05:27:09 AM

Aaen clutching book

Title: Re: P85 clutch
Post by: Lloyd (ljm) on February 02, 2018, 04:48:50 PM

Quote from: kawhead on January 31, 2018, 08:54:46 AM

how much material must be removed from the Polaris clutch to clear the vader bulkhead?

It depends a bit on which p-85 clutch you use.  There are a couple different offsets. The ones that take the ring gear for the electric start need more taken off.