Service manual

Cont’d
Item Description Item Description
Intake 26.736~26.836mm
Valve opening
temperature
58~62ºC
Height
Exhaust 26.532~26.623mm
Full-open
temperature
70ºC
Round diameter 21.950~22.050mm
Thermostat
Valve lift
3mm
Journal diameter 14.966~14.984mm Discharge
8L/h
Camshaft
Camshaft round limit 0.03mm Pressure
50kPa
Valve lifter outside diameter 7.978~7.987mm
Fuel
pump
Plunger stroke
1.8~2.2mm
Ignition system
Item Description Item Description
Ignition timing
BTDC28º ~32º
Spark plug gap
0.6~0.7mm
T.C.I system output
peak voltage
130V
Primary coil
0.7~0.96Ω
T.C.I air gap 0.4~0.6mm
Ignitor
ass’y
resistance
Secondary coil
5.8~7.0KΩ
TIGHTENING TORQUE
Specified torque
Part to be tightened Part name Thread size Quantity Torque
Oil drain Bolt M8 1 20Nm
Spark plug — M14 1 25 Nm
Recoil starter Bolt M6 3 8 Nm
Flywheel rotor ass’y Nut M10 1 44 Nm
Carburetor Bolt M6 2 8 Nm
Intake manifold Bolt M6 2 8 Nm
Cylinder head cover Bolt M6 4 11 Nm
1st tightening 15 Nm
2nd tightening
Bolt M8 4
30 Nm
1st tightening 6 Nm
Cylinder
head
2nd
tightening
Bolt M6 1
11 Nm
Rocker arm screw bolt Bolt M6 2 10 Nm
Locknut (rocker arm) Nut M6x0.75 2 10 Nm
Oil seal housing
Bolt
M8 1 18 Nm
Power unit mounting
Bolt
M6 7 8 Nm
Thermostat cover
Bolt
M6 3 8 Nm
Breather cover
Bolt
M6 3 8 Nm
1st tightening
10 Nm
Power unit
Crankcase
2nd tightening
Bolt M8 7
22 Nm
11