Weird Idle Problem

[gaillarry]

83 GS650, did a carb cleaning and the bike idles great at 1100 rpms, but will surge to 3000 rpm after 2-3 mins and stay there. I can reduce the high rpms but turning down the throttle idle screw.

I suspect an air leak but double checked everything with a propane torch (not lit) and no indication of an air leak.

I checked the diaprahms in the slider and no pin holes or rips. Carb boots are new so no cracks or leaks with new o rings.

Where to now??

[mac1170]

gday mate, did you replace the little rubber plugs, blocking off, the pilot jet, from the float bowl, regards

[gaillarry]

installed new plugs. I'll tear the carbs apart again and double check everything.

[Nessism]

Did you replace the intake boot O-rings?