running very rich still!!!

[barters44]

Hi All My 250LC still running rich after rebuild. Symptoms are: lots of smoke, will start first or second kick without choke when cold. plugs dark and wet. wont rev beyond 5000rpm - bogs down. Have checked and set oil pump, then disconected this to run on premix, 32-1, still the same. Have replaced float valves and seats and set float hight, changed main jets for 190 and needles set correct as per manual. air mix screw 1 1/8 turns out. I have dropped bars on and there is no adjustment left at the bars or carbs for the throttle cable, but it ticks over fine at around 1200rpm, however still smokey. has a 275 overbore and 350lc pipes. runs standard airbox. both exhaust smoke the same. what am I missing?

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How did you reset the ignition timing after the rebuild ?

[Norbo]

Just what i was thinking is the timing set correct 1.8 TDC

[pepsisteve]

try it with air filter element removed as well

[airbraker]

Silly really but you do have the little washers under main jet dont you...... ?

[pullmyfinger]

i have the same problem pal i have done exactly the same as you changed coil, cdi, carbs and stator but no differance been told my crank cases may be leaking gear oil through due to a bad seal crank refurbished at grampian i am at a loss too