What is the difference between comet clutches?


You could probably get away with the 108EXP (nothing smaller). It's a solid clutch.

The 4 Pro would acually give you some more flexability in tuning. If I were you I would be calling Comet to discuss their recommended tuning options for you application and see what they have to say. They do have a tech support line.
 
my dad has been running comet clutches since the early 80's, I'll ask him for ya. Anything in particular I should know about the application?
 
Dave_Vmax600 said:
mines cooked
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Unless it is broken completely (shaft etc.) I think that rebuilding it would be the better (and cheaper) way to go. If it is beyond repair, I would go with another Yamaha. They are adjustable, easy to get parts for and at least as reliable as a comparable horsepower rated comet.
 
A comet isn't really any better for that application than a yamaha clutch. The comet clutch does allow you to use polaris weights however if you desire (most polaris profiles are very similar to the 8DN-20's, great all around weight). The yamaha will probably go longer on a rebuild (although that may not be the case with a twin, the twins are hard on yamaha clutches). Personally i would go with whatever you can get cheaper in great shape.
 
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