If anyone has ridden the AC7000 IF clutches are working properly the clutching and backshift is so smooth and instant it convinces me that Yamaha button secondary is thing of past. Longevity is compromised though. More moving parts to fail. No getting around that. Team has proven to be reliable just hope that they dont go Chinese with this increase in production coming next year.
It should I agree but is nothing like how the 8JP Gates grabs. Crazy sticky. No material engineer here to explain why difference. My guess is the issue arises at full shift high rpm with falling torque of engine. No other 4 st Yamaha is like that.
jetpilot785
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If I do this clutch thing I will get both Team primary and secondary clutches. I don't know where the issue lies so I will eliminate them both from the equation. After some talk earlier, for shits and giggles I went out and pulled the primary apart to remove the spring to see how far the belt would actually go with the primary sheaves touching and they don't even come close to putting the belt to the top of the sheaves for full shift. There is a good 1/2" between the top of the belt and the top of the sheave so that's half the problem right there. Not sure how far the secondary shifts out. I may tear that thing down and mock it up without a spring and see how far it shifts out as well just to get an idea of what the clutch final drive looks like at its current full shift. That's usually the number one speed and belt killer is when the primary can shift out past the secondary's limit. At least for now, the primary doesn't shift out to its full diameter.
With what belt did you do the Primary test? Never bothered with mine since it wipes mark right off clutch sometimes and always only leaves 1/16in. 8DN length belts.
STAIN
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Yamaha primary clutches historically have never shifted out fully. SRX, RX1, Apex never ran the belt to the top with stock belt.
The falling torque curve is an interesting thought. Has anyone tried clutching for a lower RPM and checked top speed? Say 8700?
The falling torque curve is an interesting thought. Has anyone tried clutching for a lower RPM and checked top speed? Say 8700?
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I have. It can almost pull it with all the mods I have done. Stock it totally changed the personality of the sled. Felt like a Alpine. Really slow acceleration. Not fun for me. 8jp length will not ride to top. Remember the Viper C.T.C is shorter than any of the Yamahas you mention. Personally I may revisit using 8jp. Running out of winter though. Riding is #1 priority now for me.
ViperBill
Pro
Just an obersaviton. I recentley rebuilt both my clutches with all yamaha parts and find all the bushings to be extremely loose. Coming off polaris which run very tight. I know and have been told this is normal on these clutches. Our polaris clutches would act a lot like my viper when they wore out. they would become very senitive to conditions and loose top speed. I am either going to team clutches or maybe see if I can get aftermarket parts to tighten up these yamaha clutches'
Excellent honest post. I've read some Mag articles that say they would love to see the Viper lose the Yamaha clutches for a roller. My thought, thought I have been hesitant to say it due to the feedback from the hardcore Yamaha faithful, is that the Cat clutches seem to need less screwing with to be happy. Increase the weight or add a clutch kit and all is well usually. Hopefully the new Team clutching is even better.
That is a interesting observation. If done right a closer fit should be more consistent. Makes sense. Look forward to your results I think you are on to something. I may convert my secondary to a roller. Not same as what you are suggesting but should at least help consistency.
ViperBill
Pro
Well its back together and we are riding this weekend. probably the last of the year. clutching will be summer project. Speed is not a major concern would just like to see consistant rpm regardless of conditions. speed should change but rpm should be consistant regardless of conditions. My backup is a 2000 xc500sp with a team secondary and is clutched to 8600 rpm and runs it on snow.ice,dirt,water, it doesent matter and I think these sleds with their wide powerband should be able to do the same. thats the goal. The 500 will also run 100+ in idel conditions and thats gps speed.
