Was wondering if anyone else has noticed their carb intake boots "pulsating" when motor is idling? What i mean by pulsating is kind of like there "expanding & contracting" just slightly when bike is idling & was just wondering if this is "normal" or does it suggest something is wrong? The bike does run pretty well, & the only problem i do have with it, is when the bike first starts up for the day, it will sometimes backfire out the exhaust one or two very little "pops", then it's fine & doesn't do it anymore after that. But i have noticed that the idle does go up to about 1500-1600rpm's after it gets warm. The bike is basically a stock 81 gs1100e with CV carbs & K&N filters & a Kerker exhaust system. The carbs have also been jetted for the filters & exhaust. Thanks in advance for any info you may have.
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Carb boot question....
- Thread starter JT2Fast4u
- Start date
Welcome to the site, JT.
I have never seen carb boots pulsating. Have you ever synched the carbs?
A potential cause of the backfire is an improper mixture caused by an air leak. An air leak could also be the source of the idle rpm climb.
Your pulsating carb boots might need replacing. Manifold o-rings might need changing as well.
http://www.cycleorings.com/
General rule of thumb on back-firing from intake...too lean a mixture.
General rule of thumb on back-firing from exhaust....too rich a mixture.
I have never seen carb boots pulsating. Have you ever synched the carbs?
A potential cause of the backfire is an improper mixture caused by an air leak. An air leak could also be the source of the idle rpm climb.
Your pulsating carb boots might need replacing. Manifold o-rings might need changing as well.
http://www.cycleorings.com/
General rule of thumb on back-firing from intake...too lean a mixture.
General rule of thumb on back-firing from exhaust....too rich a mixture.
Thanks for all the reply's. Because I was thinking it might be the valves were out of adjustment or something, so that's a relief.
To answer your question Steve, no I haven't synced the carbs. on it, I need to get that tool soon (vacuum gauge set). I do know that at least one of the carb's has a bad needle seat (I'm assuming anyway) because sometimes the gas in the fuel line is gone after sitting for any lenght of time (couple of days), & there's no sign of any leakage anywhere. Thanks again for the quick reply's, I appreciate it.
To answer your question Steve, no I haven't synced the carbs. on it, I need to get that tool soon (vacuum gauge set). I do know that at least one of the carb's has a bad needle seat (I'm assuming anyway) because sometimes the gas in the fuel line is gone after sitting for any lenght of time (couple of days), & there's no sign of any leakage anywhere. Thanks again for the quick reply's, I appreciate it.Similar threads
