Chris I have a weird one for you..
Well, here is an interesting issue.
I have rebuilt 2 engines.
One, and Axe Rossi and the other is a RB WS7.
Both are doing something they didn't do before.
Both when reaching about 180-190 degrees will idle high.
AFter blipping on the throttle, it might come down after 5-10 seconds
If I rev the engine high, it will stay kind high for some time. 20 seconds maybe
Temps are around 230 when running on a tight track.
The engine didn't do this when I was breaking it in.
I have done the following:
replace all fuel lines.
sealed both carbs.
sealed both back plates.
seal adjustment nut to hold the carb on the block.
lubed the o-rings on the carb with silicone. (lite coating)
both have had front bearings replaced.
Nothing works.
Fuel tank doesn't leak.
Fuel tank seal looks like it's in good condition.
Tank doesn't leak when turning upside down.
Any idea what it might be??
Orings in the carb maybe??