2005 Honda CRF 250 R "makes motor backfire" Questions

rebuilt top end and now wont start just backfires but all timing i got the timing marks lined up and everything eles but it wont start it just backfires sometimes if you went by the manuals timing ...

motor backfires you can easily shear a mag key if you have a heavy flywheel, (external). However when this happens you don't usually lose spark but it will certainly cause the backfire. One other item

strange noises and wont stay running started it to get stabilizer run through it, it was cold, let it warm up. rode it for a few miles, shut it off and when i re-startd it made a loud clunking sound ...

motor over with rachet to make sure its not hiting valves 1) The cams were in the wrong position or wrong stroke when clearance was measured. or 2) The shim change was mis-calculated or shims mixed up

...backfire from the right side exhaust pipe, some black smoke came out, then nothing, the motor turns over but no spark, I checked both spark wires, with the plug still in, but grounded to the side of ...

backfire. if i stop for about 20min ten go agian it goes good for 45min. then it all repeats. I replaced fuel filter triied another carb but still the same. any help would be great. Look for air leaks

...motor. check your exhaust connections and make sure they are tight and you'll notice the backfire disappear. I've saw this several times and my bike does it as well when the bolts vibrate ...

motor cycle will not start after it fell over on the right side. What do think the problem is? Bike fell over on right side making the throttle hard to twist. The starter button and directional button

...motor to be 1986 GSX750. it runs, carby has fuel in it and seems to be working alrighty, plugs are sparking, but engine backfires a fair bit which makes me think firing order is not right..... any ...

motor a few rpm's to get a spark. Thinking after 36,000 mile's plug wire's and coil getting weak? The bike is a 2004 FLHTC no your totally wrong the backfire is bcause if u juice the throttle there is