KEEWAY RKV125 Instruction And Maintenance Manual page 27

Symptom: 4-stroke engine exhaust muffler gives off blue-white smoke
Too much engine oil in the crankcase, bleed surplus oil
and decline oil level to upper limit line.
Check if valve or valve guide is over worn.
Symptom: Incomplete separation of clutch
Check if splines on clutch active and drive hubs are worn into zigzag form
Repair or replace
4-stroke engine exhaust muffler gives off blue-white smoke
Check if engine oil level in the crankcase exceeds the upper limit line
Yes
Check if clearance between valve
and valve guide is too big.
Yes
Incomplete separation of clutch
Check if clearance of clutch handle bar is within
No
i
Re-adjust
Check if elasticity of clutch spring is even.
Yes
Yes
1. Check if clutch driven plate is warping and distorted;
2. Check if separation cam shaft, separation push rod and other
components of clutch control mechanism are excessively worn.
Start engine and run it at high speed; screw off
oil ruler and check if oil filler smokes.
No
No
Valve oil seal
damaged.
Diagnosis procedures
Check if adjusting screw for clutch push rod is properly adjusted
No
.
No
Diagnosis procedures
No
Yes
1. Check if cylinder, piston or
piston ring is over worn; 2.
Check if elasticity of piston ring
is not enough or stuck in the ring
groove; 3. Check if openings of
is piston ring are staggered with
each other.
10mm-20mm.
Yes
Yes
No
Replace the whole set of clutch
spring.
Re-adjust