P85 clutch on a mm700

H

high country

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just wanted to pass this along for the rest of you. I poped my primary and decided to go to a p85 since they are half the price and twice the quality. I found the tapers on the 30mm poo's to be the same as the mm700....30mm 1/10 taper. the clutch is a slip on, the bolt needs attention. the stock mm700 bolt is 1/2-20 but is too small on the shoulder to safely use on the poo. I found a 1/2"-20x7" bolt and trimmed a touch off the end, also a 1/2"-5/8" shouldered bushing to fit the clutch and bolt perfectly. this made it a perfect fit. I am in the middle of weight experimenting, but it looks like 10-58's will work for my elevation, if not I will trim or go 10-56's. spring is almond.

this will be tested this year, but looks like a winner.
 

As I posted on SW, I have one custom set up for me by Hartman for my modded MNT Viper. Works great. I do believe Hartman has the adapter kit foir the P85 clutch for Yamaha.
 
Maybe when I'm done riding at the end of the season...lol..sorry just had to do it. I'll see if I got pics of it when doing other mods to my sled. If not, Hartman set-up my P-85 clutch for me, maybe he may have pics to show of the bolt & spacer.
 
Basically take your Yamaha bolt with the Poalris spacer/bushing and have them turn bolt and machine spacer to match for best fit. I have a P-85 on my 94 Vmax 600. That made a big performance diff. for me.
 
I built mine for $5.00 from stock parts at ace. the bushing is a simple 1/2"-5/8" shouldered bushing. 7 1/2" long 1/2" fine thread bolt.....easy as pie. I will have some pics soon. my clutch had a weak spring, so upping to the almond.....oughta be close.

it's nice to buy brand new clutches for $250.00 instead of what yamaha wants.
 
I´m thinking of doing this om my mm700 too. Have a p85 from a 600 rmk -99
will this fit? Is there any other modifications i have to do except the bolt?

Same ofset on the p85 as stock clutch?
Can you buy just the bolt and spacer/bushing from Hartman?

Have a lot of springs and a couple of dalton adjustable weights for the p85 clutch (and almost nothing to a yamaha clutch) so this would be the right thing to do for me.

/Fredrik from Sweden
 
Not to hi-jack the thread- but does the 600 triple use the same crank as the 700? I'd like to adapt the P85 to my brother's MM600.

Any confirmation of what P85 works?
 
You need to find a wide roller triple p-85 primary clutch. The only gains you get is from guys that can,t tune. The yammie clutch & weights are way more tuneable; especially using weights with moveable mass. You can really fine tune em to with in 100 rpm,s which is a lot harder to do with a fixed mass weight.
 
My main motivation is that I've got a drawer full of Polaris clutch tuning parts and never had an issue tuning a P85 and I honestly don't have the time or patience to learn the finer points of the Yamaha clutch setup (especially when tuning someone else's sled for free!), so if I can pop a P85 on there easily enough, I'd rather go that route.
 
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