Tightening Torques; Engine Tightening Torques - Yamaha YFM250RX 2008 Service Manual

EBS01005

TIGHTENING TORQUES

ENGINE TIGHTENING TORQUES

Part to be tightened
Cylinder head (upper)
Cylinder head
Camshaft lock plate
Cylinder head side cover (1 and 2)
Cylinder head side cover 3
Cylinder head breather plate
Spark plug
Cylinder head stud bolt
Oil gallery bolt
Carburetor joint
Plate, 2
Cylinder
Left crankcase cover
Pickup coil rotor
Balancer weight gear
Valve clearance adjusting locknut
Camshaft sprocket
Timing chain tensioner
Timing chain tensioner cap bolt
Timing chain guide (intake side)
Oil filter element cover
Oil delivery pipe
Oil delivery pipe and cylinder
Oil pump assembly
Carburetor joint clamp screw (front)
Carburetor joint clamp screw (rear)
Exhaust pipe nut
Muffler joint
Muffler
Left crankcase cover
Right crankcase cover
Crankcase
Oil drain bolt
Ground lead, clutch cable holder
Neutral switch lead clamp
Starter idle gear cover
Starter clutch
Primary drive gear nut
TIGHTENING TORQUES
Part Thread
Q'ty
name size
Bolt M8 4
Bolt M8 2
Bolt M6 2
Bolt M55 2
Bolt M6 2
Bolt M6 2
— M12 1
Stud bolt M8 2
Bolt M6 1
Bolt M6 2
Bolt M6 2
Bolt M6 2
Bolt M6 9
Bolt M10 1
Nut M12 1
Nut M6 2
Bolt M10 1
Bolt M6 2
Bolt M6 1
Bolt M6 2
Bolt M6 3
Union M10 1
bolt
Union M8 1
bolt
Screw M6 3
Screw M4 2
Screw M4 1
Nut M8 2
Bolt M8 1
Bolt M8 2
Bolt M5 1
Bolt M6 13
Bolt M6 12
Bolt M12 1
Bolt M6 1
Bolt M6 1
Bolt M6 3
Bolt M8 3
Nut M16 1
2-15
SPEC
Tightening torque
Remarks
Nm m•kg ft•lb
24 2.4 18
See NOTE *1
20 2.0 15
8 0.8 5.9
18 1.8 13
10 1.0 7.4
10 1.0 7.4
18 1.8 13
15 1.5 11
7 0.7 5.2
10 1.0 7.4
12 1.2 8.9
10 1.0 7.4
10 1.0 7.4
60 6.0 44
55 5.5 41 Use a lock
washer.
14 1.4 10
60 6.0 44
10 1.0 7.4
8 0.8 5.9
8 0.8 5.9
10 1.0 7.4
20 2.0 15
17 1.7 13
6 0.6 4.4
4 0.4 3.0
4 0.4 3.0
18 1.8 13
20 2.0 15
34 3.4 25
7 0.7 5.2
10 1.0 7.4
10 1.0 7.4
20 2.0 15
10 1.0 7.4
10 1.0 7.4
10 1.0 7.4
30 3.0 22
80 8.0 59 Use a lock
washer.
E