13 Motore
1. General information
USE AND MAINTENANCE MANUAL
CHAPTER 1
GENERAL INFORMATION
XEF 250 - Rev01 / 2020
18
1.9 TIGHTENING TORQUES
Engine tightening torques
“
◊
” = 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 Nm (1.0 kgf•m, 7.4 lb•ft)
Spark plug
M10
1
13 Nm (1.3 kgf•m, 9.6 lb•ft)
Cylinder head stud bolt (exhaust pipe)
M6
2
7 Nm (0.7 kgf•m, 5.2 lb•ft)
Oil passage plug (cylinder head)
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Cylinder head bolt
M9
4
See tip at page 20.
Cylinder head nut
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Cylinder head cover bolt
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Cylinder bolt
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Oil pressure check bolt
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Balancer weight plate screw
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Balancer weight gear nut
M14
1
50 Nm (5.0 kgf•m, 37 lb•ft)
Balancer nut
M10
1
38 Nm (3.8 kgf•m, 28 lb•ft)
Timing chain guide stopper plate (exhaust
side)
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Timing chain tensioner cap bolt
M6
1
6 Nm (0.6 kgf•m, 4.4 lb•ft)
Timing chain tensioner bolt
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Coolant drain bolt
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Radiator hose clamp screw
M6
8
1.5 Nm (0.15 kgf•m, 1.1 lb•ft)
Radiator bolt
M6
4
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Radiator pipe joint bolt
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Radiator fan bolt
M6
3
8 Nm (0.8 kgf•m, 5.9 lb•ft)
Water pump housing cover bolt
M6
4
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Water pump impeller
M8
1
14 Nm (1.4 kgf•m, 10 lb•ft)
Oil pump bolt
M5
2
5 Nm (0.5 kgf•m, 3.7 lb•ft)
Oil pump cover screw
M4
1
2.0 Nm (0.20 kgf•m, 1.5 lb•ft)
Oil strainer bolt
M6
1
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Throttle cable cover bolt
M5
1
3.5 Nm (0.35 kgf•m, 2.6 lb•ft)
Throttle body joint bolt
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Throttle body joint clamp screw
M5
1
3.0 Nm (0.30 kgf•m, 2.2 lb•ft)
Air filter case joint clamp screw
M5
1
3.0 Nm (0.30 kgf•m, 2.2 lb•ft)
Air filter case bolt
M6
3
7 Nm (0.7 kgf•m, 5.2 lb•ft)
Clutch cable locknut (clutch cable adjuster)
M6
1
4.3 Nm (0.43 kgf•m, 3.2 lb•ft)
Clutch cable locknut (engine side)
M8
1
7 Nm (0.7 kgf•m, 5.2 lb•ft)
Exhaust pipe nut
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Exhaust pipe protector screw
M6
2
10 Nm (1.0 kgf•m, 7.4 lb•ft)
Exhaust pipe bracket bolt
M8
1
20 Nm (2.0 kgf•m, 15 lb•ft)
Silencer bolt (front)
M8
1
30 Nm (3.0 kgf•m, 22 lb•ft)
Silencer bolt (rear)
M8
1
30 Nm (3.0 kgf•m, 22 lb•ft)
Exhaust pipe clamp bolt
M8
2
12 Nm (1.2 kgf•m, 8.9 lb•ft)
Spark arrester bolt
M5
4
9 Nm (0.9 kgf•m, 6.6 lb•ft)
Silencer cap screw
M5
6
5 Nm (0.5 kgf•m, 3.7 lb•ft)
