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Yamaha: Boosted Sleds (Turbo or Supercharged) Turbo discussion for Yamaha aftermarket Turbo or Super Charged sleds.
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Old 05-15-2017, 01:43 PM
madsledder madsledder is offline
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Default 49/43 helix enough for mpi 190?

Looking to do some clutch changes. 8bu weight 17.2 inner,13.9 outer. 14.5 rollers, blue/white/blue primary spring. Stock 47 deg helix set at 6&1 with white/white spring. Ride 3000'-8000' and hitting rev limiter on take off, and pulling down a bit on longer climbs. Do you think this is enough finish?
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Old 05-15-2017, 04:18 PM
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zx4ever zx4ever is offline
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Have you tried the purple cat secondary spring. It seamed to help mine.
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Old 05-15-2017, 07:56 PM
madsledder madsledder is offline
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No I haven't. I'll have a look for it. I can get this pretty cheap just trying not to spend and have a hole bunch of spare clutch parts.
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