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Guzzi World

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Posts posted by Guzzi World

  1. Another possibility is loose or cracked intake boots between the throttle bodies and the cylinder. If those check out OK I'd replace the parts mentioned above just because they're so cheap and easy to do. If that still doesn't help It's probably time for a valve adjust/throttle body balance/TPS adjustment.
    thanks guys.
  2. You need to give us more information.

    At what rpm and what gear does it occur?

    At what throttle opening?

    Is the bike stock or modified?

    If modified, what was done?

    How old are the spark plugs?

    Are the relays stock?

     

    Some here have traced hesitation or stuttering under acceleration to a bad relay. The stock relays are notorious for causing problems. Most people here replace them all at the first sign of trouble. A very cost effective source for reliable relays is http://www.dpguzzi.com/relay.htm. A source for higher spec relays is http://www.motratech.com/MGR-C20.html.

    my bike is stock ,it appens at all gear , the plugs are about 1500 miles or 18 months, the relays are stock, it accurs from 1500 to 5000 RPM.

    thank you

  3. Hello Guzzisti,

     

    I've been troubleshooting unsuccessfully to solve this problem, so any input is greatly appreciated. This is about a 2003 V11 LeMans, 31K wonderful miles.....

     

    At a very low throttle opening, the engine spits back, backfires, stumbles. This seems to be independent of engine load or RPM....rather, directly related to throttle position.

     

    I first noticed it while the bike had a Power Commander installed. I removed the PC, reverted to the stock ICU. I've done the full set-up for TPS, throttle body balance, etc, per instructions posted elsewhere on this marvelous forum. No differenec, not better or worse.

     

    I then re-installed the Power Commander, and the problem is still unchanged. Adjusting the PC low-range mixture to full rich has no effect.

     

    I've read on the forum about air leaks in the throttle bodies, but I've all but ruled this out, after close inspection shows no unusual slop.

     

    HELP!!!

     

    Thanks-

    Fred

    I'm having the same problem, so I replaced the gas and the problem is less but still there . if you find the solution please post it ,and I will do the same.
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