Question about 2005 Harley Davidson XL 1200 C Sportster Custom
It sounds like a fuel problem. Next time it starts doing this, take the air filter cover and the air filter off. Leave the air filter backing plate on the engine and go for a ride. If it runs better, the carb is too rich. If it runs worse, the carb is too lean. They are usually jetted very lean from the factory to meet EPA standards.
If the bike is fuel injected, the dealer will have to change that as it's not owner servicable.
If you run it too long with the enricher on when it's cold, it will foul the spark plugs. The enricher is way rich. I usually only run the enricher long enough to get the warm enough to run while holding the throttle open or using the throttle lock. Don't run the enricher any longer than necessary. Put in a new set of plugs that try that. Big Twins are bad about the enricher fouling the plugs, Sportsters are the king of fouled plugs when using the enricher. When you purchase spark plugs, just buy the Autolite 4164 plugs. They run as well as anything out there and don't cost nearly as much.
Posted on Aug 23, 2010
I have 2008 1584cc Dyna. It slowly started runnig rough and backfired. Then after riding a minute it starts running kind of badly, but backfiing every now and then like a shot gun.I haven't checked the plugs yet, but the air cleaner looks as if no air could get throught it. Can a real bad cleaner cause this? signed confused.
Posted on May 20, 2011
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Posted on Jan 02, 2017
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