My bike is experiencing hanging idle. This happens when I move the idle screw in a little bit. As long as I have the idle screw all the way down (or barely touching), then I don't have a hanging idle
I don't think there is a vacuum leak but I may be wrong. I sprayed WD-40 on the intake boots and there was no change to the RPM.
I doubt it is running lean because I pulled the plugs yesterday and they looked fine.
The throttle cable is not sticking either.
I guess I *might* have a leak on the exhaust but I would like to hear what you guys think.
Any idea what may cause this?
Did you check the caps (plastic) on your carbs ? There is an o ring that should
be under them also.
Have you adjusted your idle once the engine warmed up ?
Just things to check. :)
I am quite sure that if you warm up your engine really well and THEN adjust the screw you're going to be fine.
Why I know that you may ask? Because I had same issue - I adjusted the idle when the bike wasn't fully warmed up. Idle used to hang as soon as the bike got warm.
Give it a try - it will take you 10 seconds (not including a ride around the block to warm her up) and you have much more to gain than lose.
If this doesn't work THEN try more complicated stuff like finding leaks, washers... whatever it takes.
But start with the easiest solution first!!
good luck!
I bought 2 new O rings to replace the old ones under the caps on the carbs.
If I adjust the idle screw to raise the idle more then slightly (and I mean a *small* amount) then the hanging idle comes back. I took the bike for a 50km journey yesterday and I was unable to raise the idle rpms, without the choke, to anywhere over 1000rpms without the hanging idle coming back.
I am pretty much forced to rise with some choke or else the bike will stall.
BTW, the float levels are fine. I checked yesterday using the clear tube method. The floats used to leak but I fixed this by replacing 2 O rings in each of the float bowls.
One issue which may cause this is the exhaust. One of the downpipe flanges only has 2 screw holding it to the block. I cannot fit a second screw in because the entrance for the screw has been....altered....following the removal of the old gasket on the block with a hand sander. It ran fine with the 1 screw on the flange before and the hanging idle issue only came up recently...