Power Unit - Yamaha F25 Service Manual

SPEC

Power unit

Part to be tightened
Oil pressure switch
Pulser coil bolt
Adjusting screw locknut
Drive plate screw
Cover screw
Sheave drum screw
PTT relay cover screw
Power unit mounting bolt
Apron screw
Drive sprocket nut
Driven sprocket bolt
Flywheel magnet nut
PTT relay lead nut
Starter motor bolt
Cylinder head bolt
Cylinder head bolt
Spark plug
Rocker arm shaft bolt
Cylinder head anode plug
Cylinder head anode screw
Thermo sensor
Oil pressure switch bolt
Exhaust cover plug
Exhaust cover anode plug
Exhaust cover anode screw
Exhaust cover plug
Oil filter
Oil filter union bolt
Exhaust cover bolt
Thermostat cover bolt
Balancer piston nut
Connecting rod bolt
Crankcase bolt
Crankcase bolt
Crankcase cover bolt
1-21
Specification
2nd
2nd
2nd
2nd
2nd
2nd
2nd
2nd
Screw size
—
M5
—
ø5
ø4
ø5
ø5
1st
M8
M4
—
M6
—
—
M6
1st
M9
3rd
1st
M6
—
M8
—
M5
—
M4
M18
—
M5
M14
—
—
1st
M8
1st
M8
—
1st
M6
1st
M8
1st
M6
M6
Tightening torques
N·m kgf·m
8 0.8
4 0.4
14 1.4
5.4 0.54
1.5 0.15
3.4 0.34
3 0.3
21 2.1
21 2.1
2 0.2
150 15.0
38 3.8
157 15.7
5 0.5
29 2.9
12 1.2
23 2.3
90°
6 0.6
12 1.2
17 1.7
18 1.8
18 1.8
2 0.2
23 2.3
2 0.2
55 5.5
18 1.8
2 0.2
23 2.3
18 1.8
40 4.0
6 0.6
12 1.2
6 0.6
12 1.2
157 15.7
6 0.6
17 1.7
15 1.5
30 3.0
6 0.6
12 1.2
12 1.2
ft·lb
5.9
3.0
10.3
3.98
1.11
2.51
2.2
15.5
15.5
1.5
110.6
28.0
115.8
3.7
21.4
8.9
17.0
4.4
8.9
12.5
13.3
13.3
1.5
17.0
1.5
40.6
13.3
1.5
17.0
13.3
29.5
4.4
8.9
4.4
8.9
115.8
4.4
12.5
11.1
22.1
4.4
8.9
8.9