ZHEJIANG KAYO MOTOR CO., LTD.
Install the throttle cable and air filter, the interface should be sealed.
3. Install the transmission chain.
4. Install the left rear cover or sprocket guard and fasten it with bolts. Pay attention to the outgoing
wire of the magneto.
5. Install exhaust muffler. The M8 nut and the exhaust pipe sealing ring should be installed firmly
with a tightening torque of 25
～
30N•m, and the exhaust port should not leak air during
installation.
ENGINE MAINTENANCE AND ADJUSTMENT
Inspection of installation bolts and nuts of cylinder head and cylinder block
The inspection is carried out at the first 1000km and every 5000km. When the engine is cold,
use a torque wrench to tighten the bolts and nuts to the specified torque.
TORQUE
M8
28
～
32N.m
M6
10
～
15N.m
CHECK THE VALVE CLEARANCE
The inspection is carried out at the first 1000km and every 5000km. Excessive valve clearance
will cause valve noise, and too small valve clearance will cause engine power drop and valve
damage. The valve clearance should be checked according to the above prescribed mileage, and
the valve clearance should be adjusted according to the following procedures:
Remove the valve cover.
Unscrew the magneto plug and timing screw plug on the left front cover, and use a 14mm
socket wrench to turn the magneto rotor until the piston reaches the top dead center of the
compression stroke (turn the magneto rotor until the engraved line on the rotor matches the
left front cover Until the timing holes on the top are aligned).
Insert a standard feeler gauge between the end of the valve rod and the adjusting screw on
the rocker arm. The clearance between the intake and exhaust valves is 0.03
～
0.05mm.
If the valve clearance is not within the above range, use a special tool to adjust it within the
specified range.
Reinstall the valve cover, magneto plug and timing plug.
NOTE
: The valve clearance should be checked and adjusted when the engine is cold.
COMPRESSION PRESSURE CHECK
The inspection is carried out for the first 1000km and every 5000km.
The inspection steps are as follows:
1. Let the engine run at idle speed and warm it up.
2. Unscrew the spark plug.
3. Install the pressure gauge and connector into the spark plug mounting hole and make sure
that the connection is firm.
4. Turn the throttle handle to the fully open position.
5. Start the engine several times with the starter motor and read the pressure gauge to show the
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