Excessive smoke and bad idle
Without knowing what kind of motorcycle you have makes it difficult to properly diagnose the problem. However, from what you have described, it sounds like the oil/fuel ratio is off (too much oil) and the sparkplug is fouling.
SOURCE: my keeway hurricane 50cc suddenly started smoking terribly bad
This may be to the automatic oiler that mixes the oil with the gas. I have a oiler on my 50cc Yamaha Zuma.
SOURCE: theres alot of smoke coming out the exhaust pipe
Sounds like the crank case engine oil level is too high. Ovefilled, Two or 4 stroke?
SOURCE: engine problems on a kx 250 2 stroke
On a 2 stroke bike cause of smoke is due to excess oil in the fuel oil mixture, incomplete combustion in the cylinder or the engine oil finding it way in through the piston rings into the firing chamber. Check the oil levels and clean the plugs, which must be black in color by now, so replace if possible and if engine oil is low, the change the piston rings. Also look up the carburetor jets/nozzles are clean and the engine gets the correct fuel/air mixture by adjusting both fuel and air jets(turns)...sodeep
SOURCE: My 81 yamaha enduro is smoking badly
Same happended to me with exactly the same motorcycle... I solved the provblem by replacing the crankshaft oil seal on the rightside of the crankcase. It solved the problem immediatly!
SOURCE: Smoke alot
You jetting is off on your carb. Raise the clip on the needle in the carb, if it still does it.....the it will need smaller jets.....see a motorcycle shop.Your bike is a two stroke and will smoke with oil coming out the exhaust if card is too rich. What raio do you mix your gas/oil at? Disregard the first post....he must think its a four stroke engine.
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