1998 roadking idles to fast after it warms up.

Replace or clean the idle air control motor. Just a note. It is 32 years old, could be wiring to the IAC motor.

COULD BE A SMALL KNOB IN MIDDLE OF CARBS, A BIT CLOSE AND TIGHT.

Warm the engine up then turn the idle speed down as low as possible to see if it will go into gear. If turning the idle down seems to work, turn the idle back up just enough to support running when the engine is warm. If your engine will not idle well then it may need carb work or other engine work such as a tune up.

Could be your IAC (Idle Air Control), leaking throttle body base gasket, or a throttle position sensor

I don't know the term tickover. If you mean it idles to high then lower the idle. It's a carbed bike right? Idle screw is on backside near front of carb but remember these Twin cams run on oil volume not oil pressure. The bike needs to idle between 1000 - 1200 rpm to maintain proper oil circulation. If you turn the idle down to get that lope or potatoe sound from the bike you can starve the engine of oil and burn it up. These aren't throw away rice rockets of yesteryear.

2004 V Star 1100 Custom, It has been sitting for several months, Bike starts and runs, It just Idles out of control when it is warmed up. ??? Any Sugestions ??

It seems the automatic idling lifter (sensor) once you switch on the a AC system has failed and thus at low idling the Ac compressor clutch gives in stopping the compressor to spin.
You have to check tht system out.
Hope this helps!

Check for vacuum leaks. Also try cleaning the ISV.


If that doesnt work go to vwvortex.com and post your issue there

either a vacuum leak or an idle air control valve problem most likely.the iac is on the side of the throttle body.cylinder shaped with a small harness.

I have a similar problem which seems to stop ,if after 20 mins of driving or warmed up engine if you stop for 10 mins the revs die to a more normal 1500 revs! it is a spanish car now living in theUK I think the problem is choke related.