Question about 2003 Yamaha V Star 1100 Classic

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Vstar 1100 idling rough and backfiring letting off the throttle

Getting the bike back out this spring, My Vstar 1100 began idling rough and backfiring when letting off the throttle. I had put the choke on full to start and then the engine tries to die when letting out the clutch in first gear.
I've replaced the plugs ( which looked OK) and changed out the gas ( which looked like it was getting varnishy yellow ) and it started running a little better, but still needs to be choked hard to start and is idling rough. runs fine once you get it on the road , but still backfires on decelleration. Also hear some rattling from the exhaust when reving the throttle, maybe a loose baffle ?
What could be the problem causing the rough idle ? maybe carburetor synch needed?

Posted by mccarley on

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mxtras

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It sounds to me that your carbs might be a little gunked up - you mentioned the gas may have been old, so it's possible that the smaller (idle) jets are slightly plugged up. Fresh fuel might do the trick and/or you could try using a fuel system cleaner and water remover. This problem might 'solve itself' with a little time.

As far as the backfire - this might be either from the carb issue or it could be related to that rattle you mentioned - you could have a loose connection at or near the head - this can **** air and cause a backfire.

I hope this helped!

Posted on Jun 10, 2010

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Peanut74

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Also look at or vacuum lines I have an 03 and that's what happened to mine hope it helps you

Posted on Apr 24, 2011

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