100 grams+12000 rpm's+big boost=?

Duke · Apr 20, 2011

zebiraross said:
Yup.

My first thought was, you blew a tungsten and threw everything out of balance causing the clutch to grenade? I've seen the little screws that hold the weight in break before and spit out a tungsten. :face-icon-small-sho

Glad to hear nobody got hurt.

summit-x · Apr 21, 2011

holly piss batman

M5- · Apr 24, 2011

Have you looked into that new gear reduction set that allows you to run 12-13000 rpm and keep the clutch at 8500? Paul knows about it as I talked to him about it a while back. I forget who's making it, somebody in the east I think.

M5

Duke · Apr 24, 2011

Greg at GNS Enterprises makes the gear reduction kit.

http://www.powerbygns.com/Products.html

zebiraross · Apr 24, 2011

Ya I've seen that. I'm going to just go with a STM primary that can handle big boost and high rpm's while giving way better belt squeeze all the way through the rpm range.

XTremist13 · Sep 3, 2011

not sure but am i missing something here......how are you guys pulling 12-13000 rpms out of that motor and not throwing a rod, arnt they rated for 10500 ? correct me if im wrong though please.

MCX KILLER · Sep 3, 2011

zebiraross said:
Pulled all 3 weights and pins off the sheeve. 100 grams of weight, 12000 rpms's and 20 psi. Guess I now know the limits of the stock primary:face-icon-small-ton. It may not look like it but this clutch only has 300 miles on it.

the stock primary has nothing to do on a turbo sled with power.maybe it can handle 320.

zebiraross · Sep 4, 2011

Xtremist13,
The engine had no problem spinning at that rpm, r1 bike engines redline at 13k. But the reason Yamaha set the rev limiter lower in the sleds I'm sure was because of the problems with the primary clutch not handling it very well like in my case. Plus one must have the ability to raise the rev limiter from stock.

zebiraross · Sep 4, 2011

MCX KILLER said:
the stock primary has nothing to do on a turbo sled with power.maybe it can handle 320.

I have no idea what your trying to say here.

MCX KILLER · Sep 4, 2011

zebiraross said:
I have no idea what your trying to say here.

the stock will make your engine rev to the rpm limiter all the time,and it will hurt the engine.No need to try to reed betwen the lines here zeb. its just a fact.you will altso get a better running sled when you get the STM. have anybody tryed STM secondary
http://supremetoolinc.com/cart/tuner-125-diameter-hd-secondary-p-113.html I think i will try it.

zebiraross · Sep 4, 2011

MCX KILLER said:
the stock will make your engine rev to the rpm limiter all the time,and it will hurt the engine.No need to try to reed betwen the lines here zeb. its just a fact.you will altso get a better running sled when you get the STM. have anybody tryed STM secondary
http://supremetoolinc.com/cart/tuner-125-diameter-hd-secondary-p-113.html I think i will try it.

I wasn't trying to read between the lines, I was just trying to understand what you were trying to say. I think I understand now.

EZmoney · Sep 4, 2011

What did Paul run on his sled last year for a clutch? i dont remember if it was stock or aftermarket.

MCX KILLER · Sep 4, 2011

EZmoney said:
What did Paul run on his sled last year for a clutch? i dont remember if it was stock or aftermarket.

Hi this is a werry good alternative, to hauch and stm 4 post clutch.This is altso way cheaper compared to the other optiones out there.
http://www.aaenperformance.com/snow_clutch.asp

zebiraross · Sep 4, 2011

EZmoney said:
What did Paul run on his sled last year for a clutch? i dont remember if it was stock or aftermarket.

He ran a stocker.

XTremist13 · Sep 4, 2011

ic so is that what alot of guys are doing then, trying to find a clutch that will handle 13000 rpms ??? found anything ?

Duke · Sep 4, 2011

IMO a stock primary and a GOOD set of primary weights will handle all the hp I need in a mountain sled.

BigFish BC · Sep 4, 2011

yup get a set of dalton ajustable weights way better than the stms.

zebiraross · Sep 4, 2011

I liked my daltons, but even with dtya-3 loaded full with the super slugs I couldn't keep off the stock rev limiter when running over 20 psi. Lower boost levels they worked ok. I still liked the supertips better because I can run so much tip weight to help with belt sqeeze
on top end which extends belt life dramatically. I agree that the oem clutch is more then adequate for mountain riding.

Duke · Sep 4, 2011

zebiraross said:
I liked my daltons, but even with dtya-3 loaded full with the super slugs I couldn't keep off the stock rev limiter when running over 20 psi. Lower boost levels they worked ok. I still liked the supertips better because I can run so much tip weight to help with belt sqeeze
on top end which extends belt life dramatically. I agree that the oem clutch is more then adequate for mountain riding.

Back to the topic of the thread, I saw a STM 8 post clutch last year, it was a thing of beauty. I would say it would be the way to go if you are trying to spin that motor that fast. $1800 USD is a little pricey for a clutch IMO, not that anything else on these sleds is cheap. Especially if you take a weight in the face? :face-icon-small-con

zebiraross · Sep 4, 2011

It sucks that they are so freaking expensive.

100 grams+12000 rpm's+big boost=?

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