I've noticed a slight surging on my Ninja as well, it has a after market muffler
on it but everything but the gearing in the rear is original....
those air screws are next to impossible to adjust... so I suspect them not being perfect..... but that wouldn't effect the surging in and about 4 grand... and that is what I am experiencing. I'm wondering if Jims shimming up the jet needles would cure this ?
Bob......
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Its too late when you've gone too far !
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