Jshep450r
08-13-2008, 11:45 AM
well i seem to have a problem that sounds like jetting... I have a 511 big bore stroker kit and it was running good then now it like sputters and almost sounds like its missing... this engine can run on pump fuel before anybody ask. I ALWAYS run 93. But i was thinking that is it possible for timing to get thrown off? Or would this be a jetting problem? right now its running on hrc jets.. It also sometimes back-fires when im riding along...