black blur Posted August 26, 2010 Share Posted August 26, 2010 Needing ideas to fix low idle hesitation/misses. Bike hesitates bad below 2500 RPM sometimes while other times it behaves fine. Also misses occasionally, which has happened at any RPM but is more common at lower revs. Does better when the throttle is more open, and worse when the engine gets hot. Also recently it has had a gas smell and my mileage has dropped like a rock. I used to get about 40 on the highway and now I can't make 25. When it first started hesitating I changed the plugs which fixed it for a day then the problems returned. My guess is that one or all of the cylinders are running rich, but I'm open to ideas both on how to fix to a/f ratio or if I have another problem entirely. Quote Link to comment Share on other sites More sharing options...
blackhawkxx Posted August 26, 2010 Share Posted August 26, 2010 You don't say what year your bike is but it might be a fuel pressure regulator. Quote Link to comment Share on other sites More sharing options...
jon haney Posted August 26, 2010 Share Posted August 26, 2010 +1 Quote Link to comment Share on other sites More sharing options...
cbrxxquad Posted August 26, 2010 Share Posted August 26, 2010 +2 and make sure the Wax valves are back in, sometimes they stick out. Quote Link to comment Share on other sites More sharing options...
black blur Posted August 30, 2010 Author Share Posted August 30, 2010 Its a '99 so it is Fuel Injected. The fuel pressure regulator is something I hadn't thought about, but does make a lot of sense. Thats what I'll try next thanks for the help. Quote Link to comment Share on other sites More sharing options...
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