Question about 2007 Buell Lightning Long XB12Ss

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Surge at low rpm

Just picked up my new long lightning. I've put 300 miles on it and it runs great at 3000 rpm and above. Around town at 200-2800 rpm it surges and just doesn't seem smooth. I took it back to the dealership and they said its fine. Is it the nature of the beast or is something wrong?

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  • Anonymous Mar 23, 2014

    bike has stumble around 2800 rpm -3000rpm..runs very smooth though at 60-80 mph..whats wrong with my bike at the lower rpms???


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Is it brand new? If so it's pretty normal. The bikes don't like running smoothly below 2k at all. As it breaks in it will get a bit better but it's difficult to not jerk it around at low RPM and slow speeds. Best bet is to keep the RPM at 2200+. Also if it is new when you get to the 1k TPS reset it should help as well.,,,

Posted on Nov 10, 2008

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Sounds like you've got a carb with a clogged jet. My guess is that the surging was a moment where the carb was actually operating well enough for the bike to run properly on that cylinder. Could also be a spark problem but you should be able to determine if this is the case rather quickly. I'd probably go ahead and replace the plugs if you haven't already...that could help...but my guess is still going to be carbs.

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