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Thread: Idles fine, bogs and dies with more than 1/4 idle.

  1. #1
    Junior Member
    Join Date
    Mar 2012
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    17
    Ok, long story short. Bike ran fine 2 weeks ago, rode it around and parked it. Went to start it Monday and if I give it more than 1/4 throttle it almost sounds like it's firing at the wrong time occasionally with a metallic thunk type noise and bogs down and dies almost immediately. Start right back up and idles perfectly. I have noticed there doesn't appear to be the standard high rev warm-up lately but on the other hand it's been sitting in 70-80deg weather.

    I've checked the boot, gas, replaced the spark plug, pulled the carb and checked the diaphragm, and given the carb a good once over, tried starting and running with the gas cap off.

    I'm completely stumped at this point, any ideas?

  2. #2
    Senior Member
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    Apr 2012
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    Milwaukee, WI
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    631
    Guessing this isn't a lightning since you said carb? But my 06 Ss has a similar problem.

  3. #3
    Junior Member
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    Mar 2012
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    2005 Buell Blast, fully stock. I was wondering just after I posted this, could this be a faulty TPS?

  4. #4
    Senior Member
    Join Date
    Mar 2012
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    271
    I would replace the boot anyways.

    Disable clutch safety by flipping center diode and cut and twist/solder wires together that connect with the kickstand safety. They fail often and cause misery.

    Do those three things and then report back. A boot tear is often very difficult to detect. They should be replaced often until you have Dans superboot.

  5. #5
    Junior Member
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    Mar 2012
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    17
    Would the kickstand safety and/or the clutch safety affect it even when not moving? Also, anyone have suggestions for best places to buy Blast parts other than eBay?

  6. #6
    Junior Member
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    Mar 2012
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    17
    Just ordered the superboot from Dan, anyone else that reads this he has a few more for sale right now on eBay.

  7. #7
    Senior Member
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    Mar 2012
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    271
    Yes, they can keep you from starting the bike if they are not working correctly.

  8. #8
    Junior Member
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    Mar 2012
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    17
    The bike starts fine so I doubt it's that. But, I never thought about it though but I'll probably disable the clutch switch anyways, it's a hassle to hold the clutch while trying to start it when I'm holding everything.

  9. #9
    Junior Member
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    Mar 2012
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    17
    *Ignore*

  10. #10
    Junior Member
    Join Date
    Mar 2012
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    17
    oh the good times....I tore half the bike apart and disabled the TPS to test if it was messing up, nothing. Hooked up a timing light and noticed the light wasn't flashing regularly so I figured must be the coil pack or ignition module. Moved the coil wire out of the way and everything started working perfectly...Bike's been down for over a week because of the spark plug cable.

    On the positive side the bike runs great now and the clutch sensor is disabled to let me start it one handed.



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