Clutch slipping

V

vmax600sx

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Joined
Jan 27, 2004
Messages
4
Hi

I have a 1997 vmax600sx with Aaen twin pipes. I had a comet clutch on it and am now back to the stock clutch (I sent my Comet in for warranty and it is now lost :cry: ). I put it together last night and went for a ride and something is not right.

The rpm's are about 400 low (should be 82-8300) with the stock weights (8CR with 3.1 gram inner and 3.6 gram outer) in the machine. Aaen says to take out the outer rivet in the pipe spec sheet so I will do this and the rpm should be close to optimum. I am running the stock White-Silver-White spring. Aaen says to use an Orange Black Aaen spring but I do not have access to one of those to try right now and do not know the rates of it to cross over.

The secondary has a Dalton 51/43 helix and the stock spring. I can't remember for sure what angle it is set at.

The machine is engaging a bit low so it is doggy out of the hole but the weight change and an engagement shim or two should help this out. What is weird is the acceleration is ok until about 65-70 mph then the clutch seems to slip or at least the engine revs up real quick all of a sudden. Let off the gas and it stops slipping and carries on normally.

I cut the test short at that point as it was pretty cold (-29C) and I wasn't to keen on walking home.

Any ideas on where to start. I had on a Goodyear Powerstreak (I know it's a cheap belt but I had been having some troubles with Dayco belts) belt that I had bought in a pinch last year. It measures up good and is not worn out.

Thanks in advance

Ron
 

Get a new or good 8DN in there and then test. It's too hard to answer while your using a Goodyear belt. I did not even know Goodyear made belts. Also use your 3M scotch bright green pad and clean your primary. This is a bit dangerous but works best. Remove the belt and start your sled. Put on your mech glove and stick your hand in the moving primary with the 3M pad. Clean the clutches real good. It sounds crazy but it's not as bad as it sounds. It cleans your primary very good. The secondary is a pain because you have to do it manually. That should do it for you if everything else is in spec. Doug
 
Thanks for the info. I think I will do the cleaning manually though. A wise man once told me never put my fingers where I wouldn't put my pecker. This has served me well so far.

I have a older Yamaha belt that is in good condition. I will pop it on and try it then. I will also go and buy a new one.

Thanks again.

Ron
 
Ok, I pulled out the outer rivet in my weights, cleaned the clutch faces, and put on a Yamaha 8CH belt that I had (my service manual calls for 89L). The belt is what came on the machine as a spare. Took it out for a spin and everything is improved. Engagement is up to about 3800, the rpm is up to about 82-8300 and no more slippage.

Thanks a lot for the help.

Ron
 
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