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Thread: My Bonnie went from running great to rubbish while I stopped for a coffee.

  1. #1
    JamesH Guest

    My Bonnie went from running great to rubbish while I stopped for a coffee.

    Hi All

    I'm not mechanically minded but my bike has developed a problem.

    I recently had a lot of work done on it and for the last few rides has been running absolutely brilliantly.

    This weekend I take it out and it runs sweet as per usul. I catch up with a friend in a cafe and I get back to the bike and it's rough as guts. It starts and runs. You can rev it and it's fine. Get on and put any sort of load; put it in gear and you have to be very gentle and short shift etc to keep going. Open her up even mildly and she splutters, misses and complains. Just refuses to get up and go.

    All the plugs leads and fuel lines are brand new and I went through and checked they were still joined etc. This is not the first ride since I got the work done. It's about the fourth and it was all great until I came back to it. Everything obvious has been checked on the side of the road and I'll go though it again.

    Another obvious thing is some dirt somewhere restricting fuel so I'll look into that but I'm not sure fuel delivery is the problem -something tells me it's getting the fuel to burn that's the problem.

    Tell me somebody wouldn't have put something into the tank when my back was turned....

  2. #2
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    Timing or carbies.
    If you don't like trucks, stop buying stuff.
    http://www.aulro.com/afvb/signaturepics/sigpic20865_1.gif

  3. #3
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    check the air cleaner I once had my work pass fall into the intake on my Z650 same symptoms

  4. #4
    JamesH Guest
    Quote Originally Posted by V8Ian View Post
    Timing or carbies.
    Cheers, Ian. It's an electronic ignition model so I'm guessing there's a faulty connection? Or would a bad connection mean it will simply die and not run at all? I'll go through the leads again carefully.

    Or carbies, they've been fully serviced/rebuilt but something could go amiss. They are getting the job done at a low opening but when opened up something is could be going wrong.

  5. #5
    mike 90 RR Guest
    Quote Originally Posted by JamesH View Post

    I recently had a lot of work done on it .....
    .... And the workshop is in Morley??? ....

  6. #6
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    Sounds fuel to me. Blocked main jet or similar. Maybe on just one carb. A very lean mixture can give missfires, backfires, etc.

  7. #7
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    James what make of bike is it ?

  8. #8
    JamesH Guest
    Quote Originally Posted by mike 90 RR View Post
    .... And the workshop is in Morley??? ....
    Yes, Mike. And thanks for that recommendation, I still believe they do geat work and the bike ran sweet until this problem.

    Stone the crows they relieved me of some coin, though.

    Copped a bit of an earful about having a good bike and not looking after it, leaving it locked up in the damp for months on end. I did the walk of shame past The Committee hanging out back to collect it. Good blokes, but harsh.

  9. #9
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    Quote Originally Posted by Grockle View Post
    James what make of bike is it ?
    Triumph Bonneville probably

  10. #10
    JamesH Guest
    Quote Originally Posted by Grockle View Post
    James what make of bike is it ?
    81 Triumph T140E. I'm a sucker for the gear you Poms make. Just love it, though God knows what I did in a previous life to deserve this curse.

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