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High idle issue on CV carbs

This is a discussion on High idle issue on CV carbs within the Technical forums, part of the Caferacer.net Forums category; Idle has held for 2 days with no change so I am happy with that. But yesterday I noticed a change to the exhaust note. ...

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Thread: High idle issue on CV carbs

  1. #11
    Ews
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    Idle has held for 2 days with no change so I am happy with that. But yesterday I noticed a change to the exhaust note. Nothing serious, fairly subtle really, but since I ride the damn thing every day, I notice it. Performance of the bike does not feel impacted, still goes from dead stop to 60 like a raped ape. Compression feels a little off, but maybe i'm just being paranoid. I swapped my plugs from side to side, no change to the exhaust note. I think the number 2 cylinder is having a misfire caused by the coil (approx 1 missfire every 20ish clean fires), but I do not have a replacement to verify. That or its just not getting enough spark to create a clean burn. I still need to do a compression test though to make sure there are not more serious issues.
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  2. #12
    Senior Member TrialsRider's Avatar
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    I thought you got rid of that bike :|

    Maybe try: Run it in the dark and see if you notice any flames shooting out the exhaust after it misfires.

  3. #13
    Ews
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    Quote Originally Posted by TrialsRider View Post
    I thought you got rid of that bike :|

    Maybe try: Run it in the dark and see if you notice any flames shooting out the exhaust after it misfires.
    It's up for sale right now. But I still have to ride it everyday so I'd like to make sure it keeps running smoothly until I sell it, then after that its the next suckers... I mean persons problem
    Dream as if you live forever, Live as if you die today.~ James Dean

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  5. #14
    Senior Member crazypj's Avatar
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    Probably still has problem in coil where HT lead enters. The water has probably broken down insulation and tracking spark has carbon to leak through Pretty sure you'll have to at least pull tank to check. May be worthwhile getting a spare coil before doing anything? Oh, If you have Kei-Hin carbs, take a look and make sure the throttle shaft plugs are in place
    Last edited by crazypj; 04-24-2019 at 12:15 AM.
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