by alex3012red » Fri Mar 23, 2018 8:31 pm
It started with changing the intake valves, after a baja trip,(would no longer start, intake valve) took head apart changed valves both intakes, and checked clearance on intake/exhaust, i also re-jetted the carb, don't remember off my head but i think its 165 main 48 pilot and crf 450r 05(i think) needle 3rd pos. got it off this forum, re packed mufler, anyway the bike now starts right up, idles good but misses or sputters and back fires on acceleration around mid accelarator, i have checked just about everything i could think off, i even went back tore the carb appart to recheck it put old jets back in, checked grounds, checked timming (like 4 times) cause it sounds like its off time, i also forgot to mention i put new batt, and starter solenoid. sorry for the long post, any ideas on what to check now, just about gave up on the bike, spend 3 days working on it with same results, just frustrated