2003 Sportster 1200 backfire sputter and not firing
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2003 Sportster 1200 backfire sputter and not firing
My 2003 Sportster 1200 just started a problem...hard to start, when i do get it started the rear cylinder doesnt seem to be running...cold exhaust comes out and there is not the normal vroom. Front cylinder seems to be running fine. Choke has to be pulled out all the way. After a minute or two the rear cylinder begins to fire and occasionally backfires. Even when warmed up i have to leave the choke pulled out and rear cylinder backfires every few seconds. Carb cleaner and "sea foam" brand cleaner dont seem to be working. Fresh gas in bike. I have never pulled this carb off. What do i need to do/check before i start taking the carb apart?
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Plugs do fail....but buy a service manual for your bike and do some serious mait. on the bike. Plus the HD service manual has great trouble shooting guides in it. Plus some good advice was posted above.
This place will help you tune your carb.
Harley Davidson Performance Tech Tips
This place will help you tune your carb.
Harley Davidson Performance Tech Tips
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