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Scotty426

Run well or run quite?

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Anyone hear any theories about why older (up '03) Yamahas don't run well when quiet? I had trouble when I put in a quite core insert. I tried every jet combination known to man and it cleared right up when I took the insert out. I have read about this phenomena in a few magazines, but they never explain why.

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race bikes were made for track in mind. not quite puppys. mess /w/ the jetting more, go down 3-5 #'s on every jet. (needle, 1 clip)

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