yama450yfz
07-24-2013, 04:04 PM
Ok, so here is what I have. 2009 KX450F I just rebuilt the entire bike over the winter and spring and a little bit of the summer, but who's counting. I had the head cleaned and valve job, cylinder honed, stage 1 intake and exhaust hot cams, wiseco cam chain, wiseco piston standard bore and compression, idle screw at 42 clicks out, Denso Iridium plug, UNI filter, air screen delete, and a Jardine RT99 full exhaust. I did not have the bike dyno tuned or any maps uploaded. It ran fine before the tear down just was a new to me bike with unknown service history. The bike will start sometimes on one kick and other times it takes several. It will run for a few seconds then die. I can give the bike throttle and it will rev up but it seems to only want to run for a few seconds then dies. I am not sure what the problem is here, any help would be greatly appreciated. Thanks