7
2-4 Torque parameters
Fastening position
Fastening part
Torque (N·m)
Oil drain plug
3/8-18NPTF
20 ± 2
Connecting rod bolt
M8 × 38
16 ± 1.5
Mounting bolt of governor gear
M6 × 14
10 ± 2
Closure bolt (special bolt)
M8 × 45
24 ± 2
Assembly of spark plug
M14 - 1.25
22 ± 2
Rocker arm shaft bolt
M8 × 1.25
24 ± 2
Valve locking nut
M6 × 0.75
10 ± 1
Cylinder head cover mounting bolt
M6 × 16
10 ± 2
Mounting bolt of breathing tank cover plate
M6 × 16
6 ± 1
Assembly of cylinder head
M10 × 60
45 ± 3
Assembly of cylinder head
M8 × 50
24 ± 2
Breathing plate combination
M4 × 10
1.5 ± 0.5
Starter motor components
M8 × 55
24 ± 2
Charging coil combination
M5 × 25
7 ± 1
Flywheel nut (cast iron flywheel)
M16 × 1.5
160 ± 10
Ignition coil mounting bolt
M6 × 25
10 ± 2
Air filter intake pipe
M6
10 ± 2
Mounting nut of governor bracket
M6
7 ± 1
Muffler components
M8
24 ± 2
Note: refer to the standard torque for the bolt, screw and nut without special provisions.
2-5 Standard torque parameters
Fastening part
Thread specification
Torque (N·m)
Bolts and nuts
5 mm bolt and nut
4.5-6
6 mm bolt and nut
8-12
8 mm bolt and nut
18-25
10 mm
bolt and nut
29-34
12 mm
bolt and nut
49-59
4 mm
screw
1.5-2.6
5 mm
screw
3.5-5
6 mm
screw
7-11
5 mm
flange bolt
3.6-6.9
6 mm
screw
7-11
5 mm
flange bolt
3.6-6.9
6 mm
flange bolt
10-14
8 mm
flange bolt
20-26
10 mm
flange bolt
35-45
