Yamaha YFM250XL(C) Service Manual page 36

Tightening torques
Part to be tightened
Cylinder head (oil gallery plug)
Cylinder head
Cylinder head and Cylinder
Cam sprocket cover
Tappet cover
2
Camshaft bushing retainer
Spark plug
Cylinder
Balancer drive gear
Starter pulley
Valve clearance adjusting locknut
Cam sprocket
Chain tensioner
Chain tensioner cap
Chain guide (intake)
Oil pump
Drain plug
Oil filter cover (drain)
Oil filter cover
Carburetor joint and cylinder
head
Carburetor and carburetor
joint
Carburetor and joint hose
Air filter case and joint hose
Air filter case and air duct
Muffler
Muffler and exhaust pipe
Exhaust pipe
Crankcase
Recoil starter
Crankcase spacer (right)
Crankcase cover
Bearing retainer (right)
Clutch cover protector
Crankcase cover (right)
Crankcase cover (left)
Clutch carrier assembly
Clutch spring
Clutch boss
Shift cam segment
MAINTENANCE SPECIFICATIONS
Part
Thread size Q'ty
name
Bolt
Flange bolt
Bolt
Screw
Bolt
Bolt
—
Bolt
M14 × 1.0
Nut
M10 × 1.25
Bolt
Nut
Bolt
Bolt
Bolt
Bolt
Screw
Plug
Bolt
Bolt
Bolt
Hose clamp
Hose clamp
Hose clamp
Hose clamp
Bolt
Bolt
Bolt
Screw
Screw
Screw
Screw
(left) Screw
Screw
Screw
Bolt
Screw
Bolt
Nut
Screw
Tightening torque
Nm m·kg ft·lb
M6 1 7
M8 4 22
M8 2 22
M6 2 7
M6 5 10
M6 2 8
M12 1 17.5
M6 2 10
1 50
1 50
M6 2 14
M10 1 60
M6 2 10
M6 1 7
M6 2 8
M6 3 7
M35 1 43
M6 1 10
M6 2 10
M6 2 12
M4 1 2
M5 1 2
M5 1 2
M5 1 2
M8 2 34
M8 1 20
M6 2 10
M6 11 7
M6 6 7
M6 8 7
M6 3 7
M5 3 7
M6 3 7
M6 9 7
M6 8 7
M22 1 78
M5 4 6
M14 1 50
M6 1 12
2 - 12
SPEC
Remarks
0.7 5.1
E
2.2 16
Apply oil to the
washer
2.2 16
0.7 5.1
1.0 7.2
0.8 5.8
Use lock washer
1.75 12.5
1.0 7.2
5.0 36
Use lock washer
5.0 36
1.4 10
6.0 43
1.0 7.2
0.7 5.1
0.8 5.8
0.7 5.1
4.3 31
1.0 7.2
1.0 7.2
Tighten cable
1.2 8.7
guide together
0.2 1.4
0.2 1.4
0.2 1.4
0.2 1.4
3.4 25
2.0 14
1.0 7.2
0.7 5.1
0.7 5.1
0.7 5.1
0.7 5.1
LT
0.7 5.1
LT
0.7 5.1
0.7 5.1
0.7 5.1
7.8 56 Use lock washer
0.6 4.3
5.0 36 Use lock washer
1.2 8.7
LT