2000 Harley Heritage twin cam carborated model. Idle went from 1000 rpm to 800-850 rpm. Turned idle up to 1000 rpms. Took bike for a ride, when stopped at red-light, now idle is at 1200 rpms and goes down to 950 and back to 1100 rpms. Keeps fluctuating from 950 to 1200 rpms. Changed plugs and still does it.
It sounds as if you may have some partially contaminated fuel entering the carbs. About the only other thing I can imagine that would cause this is a very small vacuum leak at the point where the carbs mount. Carbs have even been known to shake loose at the air horn to main body gasket. Good luck!
SOURCE: 2002 heritage softail classic revs during shifts
is the throtle cable free it my be hung up under the tank or somewhere in the routing
SOURCE: harley engine wont idle
Your bike has an idle screw on the carb. looking at carb its on the right side turn to the right to bring up your idle.
SOURCE: how to slow fast idle in heritage softail
Sorry but you have to take it to a dealer or someone with a box that can adjust the idle speed. Your fuel injected bike is just like your car, there isn't much can as an owner can do to them anymore. It's been headed that way since 1999. The days of fixing your own motorcycle are slipping away quickly. That's why I'm keeping my old bikes. I can still work on them.
Good Luck
Steve
SOURCE: Having trouble with my 2000
pull your seat and the fuses and breakers are at the rear fender. Fran [mechanic]
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