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Old 08-06-2005, 03:41 PM
Bear Bear is offline
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Flat Spot Kawasaki Vulcan 750

1999 Kawasaki Vulcan 750. Have adjusted the idle and mixture (both carbs) but I have a flat spot accelerating between 2500 RPM and 3000 RPM. All other RPM ranges are fine and most notable (obviously in first gear). Any suggestions?
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Old 08-06-2005, 10:12 PM
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Aces0vr8s Aces0vr8s is offline
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i have a 98 cbr and have a flat spot too its just a combo between the cam and gearing of the bike
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Old 08-07-2005, 12:33 PM
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Flat Sot

I hear you. But, I wonder if it is going lean at the point the carburetor/s change or transition from low to high speed jets or maybe the butterfly is hanging up momentarilly at that point.
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Old 08-07-2005, 08:05 PM
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Flat Spot

Closed fuel pet cock, started bike and let her run until she died, disconnected fuel line to carbs, filled with carb cleaner, reconnected line and started her up. She huffed and puffed, blew black and then gray smoke, opened pet cock and let fuel flow to carbs, ran her at about 3000 RPM for 30 seconds, then took her for a ride and she is smooth as glass. Pro9blem solved.
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Old 08-07-2005, 08:36 PM
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Re: Flat Spot Kawasaki Vulcan 750

aces maybe u need to clean ur jets ... i need to do that to mine and also check my plugs...
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