09 FZ1 Surging on idle.


New Member
Hey there everyone. I have 2009 FZ1 that has a weird surging idle issue. Upon cold start the bike warms up good and has no problem. If I let it warm up and turn it off then back on again it’s fine. The problem is if I for example turn the bike off to get gas, or turn it off for a couple minutes then back on, it surges on idle, up and down, but then it smoothes itself out after 30 seconds or so. My bike has a full system exhaust, vcyclenut flash, gutted cat and airbox. Is this surging a problem or should I not be worried? Thanks everyone.