SOURCE: Rear cylinder not firing
The first thing I would do is replace the spark plugs again. You can foul a plug and it will cause you more problems than you can ever imagine. I see you have done all the logical things that I would recommend but I did not see you have replaced the plugs after the 200 miles. You would be surprised at how many times a $2.00 part can cause fits beyond belief.
SOURCE: 04 sportster 883 will turn over and back fire but will not start
Sounds like it jumped time.. Check your timing ..
SOURCE: Won't start?
With just this info.Not knowing if the engine is stock or has bigger cams or high comp pistons.I would say check the starter solenoid by running jumper wire from one side to the other.then check ALL connections for corrosion and tightness
SOURCE: HD 1200 Sportster 1997 model misfiring on rear cylinder
hi paul here,
the coil on my bike turned out to be the problem after checking wires, connections and plugs. brought a used single fire.
tried it out after being told that coils usaully go all bad not just half.
have not had the problem since and i was conteplating buying ignition and coil combo for hundreds.
good luck
SOURCE: what type/brand carburetor does a 2003 sportster
if it is carborated it has a kehin carb. made for harley
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