zerorev3rev4 Posted May 20, 2018 Report Share Posted May 20, 2018 Got a 2006 250 rev 3 with low use having trouble with an erratic running when warmed up pulls through gears fine but looses response just off tick over goes droggy n plenty pinking Almost like it's too rich but with pinking at same time to date I've changed Crank bearings and seals rings case gasket cylinder gasket new plugs of differnt heat range stator and cdi brand new and good used coil Inc lead n cap kill switch disconnected 2 carbs Reed block assembly flywheel new air filter tank drained tap cleaned out can't pick up on any air leaks spraying carb cleaner around it problem was there before rebuild n suspected Crank seal I am thinking it needs a crankcase pressure drop check. Just pulled head wondering if rod was bent piston comes up square but not level with cyl top ie 2 to 3mm lower is this normal Quote Link to comment Share on other sites More sharing options...
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