YG125-30A Maintenance Manual Overview
9
Standard Torque Values
ENGINE
Item
Quantity
Thread diameter
(mm)
Torque value (N.m)
Thread locker
Cylinder head cover connecting bolt
13
8
8
～
12
Cylinder bolt
4
10
40
～
50
2
6
8
～
12
Valve adjusting screw nut
4
10
8
～
12
Timing driven sprocket bolt
2
7
7
～
11
Rocker-arm shaft cover
2
14
24
～
28
Magneto flywheel fastening nut
1
12
38
～
45
LOCTITE 243
Clutch fastening nut
1
18
114
～
126
LOCTITE 243
Primary driving gear fastening nut
1
18
143
～
157
LOCTITE 243
Oil drain plug
1
12
28
～
32
Crankshaft, main-shaft bearing baffle screw 5
6
8
～
12
LOCTITE 648
Stud
1
6
8
～
12
Stud
4
10
40
～
50
Exhaust valve stud bolt
2
8
10
～
14
LOCTITE 243
Stator connecting bolt
3
6
8
～
12
LOCTITE 648
Stator leads pressure plate bolt
2
6
8
～
12
LOCTITE 648
Spark Plug
1
12
18
～
25
Pensioner plate fastening bolt
1
6
7
～
10
Vehicle body
Item
Quantity
Thread diameter
(mm)
Torque value (N.m) Thread locker
Front wheel spindle
1
14
50
～
60
Front vibration damper plate
1
10
30
～
40
Real wheel spindle nut
1
16
60
～
90
Rear fork shaft nut
1
14
50
～
60
Engine hanging bolt
3
10
30
～
40
4
8
20
～
30
Steering handle set bolt
4
8
20
～
30
Front fork vertical pipe cap nut
1
22
60
～
90
Lower connection plate set bolt
2
10
30
～
40
Upper connection plate set bolt
2
6
8
～
12
Rear sprocket nut
6
8
20
～
30
LOCTITE 243
Brake disc fastening nut
8
8
20
～
30
LOCTITE 243
Speed signal panel screw
4
8
20
～
30
LOCTITE 243
Front brake caliper screw
2
8
20
～
30
LOCTITE 243
In addition to the torque values of the important parts as listed above, the torque values for other standard
fasteners are as follow:
https://www.motomanuals.net/
