gs550 idle problem

[Guest]

I redid my 1982 gs550m this winter/spring. To make a long list short, I rebuilt/rejetted carbs with a dynojet stage iii kit and a mac 4-1 exhaust. I just got her running pretty good and synced carbs up the best I could. But the problem I am having is that the idle seems to jump up to around 3k for no apparent reason. It will idle fine, then I?ll jump on to go for a ride, and at the end of the driveway when I stop to enter the street the idle won't drop below 3k. Same thing if I stop at a light or stop sign. But the strange thing is if I turn the idle adjust screw a tiny bit it will drop down to around 1k where I initially had it set.

Any suggestions?

[gspaul]

Most likely an vacumn leak between carby's and head, or a sticking slide in a carby, but less likely.

[runrx02]

I thought vac leak too, but the intake boots are brand new and sealed. As for carb slides, I will check that out, but they have just been cleaned.
What i dont understand, is why the idle jumps down to where it should be when i turn the adjustment just a tiny bit

[gspaul]

You can rub a little bit of oil on the slides , I use two stroke.
Strange that the idle jumps like that though!
You say you "synced the carb's the best you could"
If this mean's you just did a bench sync that may be your problem.

[Anonymous]

Check that the throttle cable has the proper amount of free play, and that the cable is routed properly, this can cause irratic carb behaviour.

Andre