Failure diagnosis procedure when the exhaust muffler of two-stroke engine gives off strong blue and white
smoke
Failure diagnosis procedure when the gear shift is difficult to shift
The exhaust muffler of two-stroke engine gives off
strong blue and white smoke
Check if the engine oil level in the crankcase exceeds the upper label
If the engine oil in the crankcase is
overfilled, please drain out the excess
oil and make sure the oil level does
not exceed the upper label
1. Check if the cylinder, piston and piston
ring are over-worn
2. Check if the elasticity of piston ring is
insufficient or sticks in ring groove
3. Check if the opening positions of piston
ring are staggered
The gear shift is difficult to shift
Start the engine and check if the idle speed of the engine is too high
Check if the gear-shifting operation is coordinating
Check if the clutch is separated completely
Improve the operation method
Check if the gear-shifting axis is deformed, and if the
gear-shifting arm is deformed or over-worn
1. Check if the free stroke of clutch
lever is within 10mm ~ 20mm
2. Check if the spring force of clutch
is even
3. Check if the driving and driven hub
alveolus are worn to indention
4. Check if the clutch driven plate is
deformed
5. Check if the parts of clutch control
mechanism are over-worn
1. Check if the gear-shifting camshaft and
cam groove are over-worn or damaged
2. Check if the shift fork hole is over-worn
3. Check if the shift fork is deformed
4. Check if the declutch shift shaft is
deformed or over-worn
Start the engine and make it run at high
speed, remove the engine oil scale to check if
the engine oil filling port smokes
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