Quote Originally Posted by Zorge View Post
Engine rises revs, at first sight, without reason, also in case if he gets too lean mixture, when carb doesn't provide enough fuel - cause can be too low fuel level in carb bowl (stuck needle valve, closed/dirty petcock, etc.). That is the first that comes to mind.
Ah, yeah, darn, should had thought about a bit more. But good you said! Lean very bad in two strokes.