1. General information
USE AND MAINTENANCE MANUAL
CHAPTER 1
GENERAL INFORMATION
4-Strokes - Edition 00 / 2022
35
1
Engine tightening torques (XXF 250 version)
“
◊
” = marked portion shall be checked for torque tightening after break-in or before each race.
Item
Thread size
Quantity
Tightening torque
Remarks
Camshaft cap bolt
M6
8
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Spark plug
M10
1
13 N·m (1.3 kgf·m, 9.6 lb·ft)
Cylinder head stud bolt (exhaust pipe)
M6
2
7 N·m (0.7 kgf·m, 5.2 lb·ft)
Oil passage plug (cylinder head)
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder head bolt
M9
4
Vedere nota a pagina 37.
Cylinder head nut
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder head cover bolt
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder bolt
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Oil pressure check bolt
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Balancer weight plate screw
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Balancer weight gear nut
M14
1
50 N·m (5.0 kgf·m, 37 lb·ft)
Balancer nut
M10
1
38 N·m (3.8 kgf·m, 28 lb·ft)
Timing chain guide stopper plate (exhaust
side)
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Timing chain tensioner cap bolt
M6
1
6 N·m (0.6 kgf·m, 4.4 lb·ft)
Timing chain tensioner bolt
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Coolant drain bolt
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Radiator hose clamp screw
M6
8
1.5 N·m (0.15 kgf·m, 1.1 lb·ft)
Radiator bolt
M6
4
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Radiator pipe joint bolt
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Water pump housing cover bolt
M6
4
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Water pump impeller
M8
1
14 N·m (1.4 kgf·m, 10 lb·ft)
Oil pump assembly bolt
M5
2
5 N·m (0.5 kgf·m, 3.7 lb·ft)
Oil pump cover screw
M4
1
2.0 N·m (0.20 kgf·m, 1.5 lb·ft)
Oil strainer bolt
M6
1
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Throttle cable cover bolt
M5
1
3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
Throttle body joint bolt
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Throttle body joint clamp screw
M5
1
3.0 N·m (0.30 kgf·m, 2.2 lb·ft)
Air filter case joint clamp screw
M5
1
3.0 N·m (0.30 kgf·m, 2.2 lb·ft)
Air filter case bolt
M6
3
7 N·m (0.7 kgf·m, 5.2 lb·ft)
Clutch cable locknut (clutch cable adjuster)
M6
1
4.3 N·m (0.43 kgf·m, 3.2 lb·ft)
Clutch cable locknut (engine side)
M8
1
7 N·m (0.7 kgf·m, 5.2 lb·ft)
Exhaust pipe nut
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Exhaust pipe protector screw
M6
2
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Exhaust pipe bracket bolt
M8
1
20 N·m (2.0 kgf·m, 15 lb·ft)
Silencer bolt (front)
M8
1
30 N·m (3.0 kgf·m, 22 lb·ft)
Silencer bolt (rear)
M8
1
30 N·m (3.0 kgf·m, 22 lb·ft)
Exhaust pipe clamp bolt
M8
2
12 N·m (1.2 kgf·m, 8.9 lb·ft)
Silencer body bolt
M5
6
8 N·m (0.8 kgf·m, 5.9 lb·ft)
Oil nozzle bolt
M5
1
5 N·m (0.5 kgf·m, 3.7 lb·ft)
Engine oil drain bolt
M10
1
20 N·m (2.0 kgf·m, 15 lb·ft)
Crankcase bolt
M6
13
12 N·m (1.2 kgf·m, 8.9 lb·ft)
