SOURCE: 1999 x1 lightning 118/250 runs on 1 cylinder
I have a 99 X1 #170/250 it does same thing when its cold. I put the buell race module still does it took it in and had motor turn apart and found nothing bike runs great when its warm you need to let it warm up it should start to fire
SOURCE: I have a Buell 2008 lightning xb12ss, its just started
Some early 2008 models have issues with the Idle Air Control motor that can cause those symptoms. This would be covered for replacement under warranty.
These symptoms could also be an intake leak.
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