2005 Honda CRF 450 R "back fire" Questions

crf 450 running hot it starts fine but back fires and gets super hot right away . Timing is on and vavle clearence is on. Back firing usually indicates a timing problem.

2002 crf450, rough running, back firing, hard start hard start, back firing, sudden onset problem, valves? coil? replaced sparkplug but same. Classic valve train issues. Sounds like the valves are ...

hard to start back fires after riding a while or the bike is on for 10 min it will take 20 to 30 kicks to start some times it back fires and throws flames out of the muffler i think there is problem ...

...it fires once a while and back fire thru carb , timing chain looks right on the money, just riding it and it died and wont start ? Check your flywheel the keyway probably broke i had the same ...

bike keeps back fireing when first starting i just got a crf 450r and every time i go to start the bike it always back fires for ages then it mite go or not is it stale gas or is av gas the bike shop ...

...and ran well until it completely cut out with no splutter warning or anything..but weirdly it fired back up first kick and ran perfectly for another 10-15min then the problem would surface again.Ive ...

...now i tried to start it back up and there is no fire from the spark plug and i just bought a new plug and put in it so if you can help me with this thanks? Maybe the Cdi unit or coil check them ...

problem starting every time i try to start the bike it back fires i just got the bike but not sure what it would be sounds more like a slipped timing chain to me, big problem area on the big power ...

2004 CRF450R Ok so the bike back fires like crazy when i start. Now for the last three years this bike has been perfect. It has a white brothers pipe, I have jetted the bike for the pipe this is all ...

...it wont run for real long and stalls.after doin this for couple of minutes itll finally high idle.back fires the hole time untill it warms up they runs good.starts right up warm 1. First thing is ...