Yamaha YZ250(W)/W1, Owner'S Service Manual

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4-65
CRANKCASE AND CRANKSHAFT
ENG
EC4N0000
CRANKCASE AND CRANKSHAFT
Extent of removal:
1
Crankcase separation
2
Crankshaft removal
3
Crankshaft bearing removal
10 Nm (1.0 m•kg, 7.2 ft•lb)
30 Nm (3.0 m•kg, 22 ft•lb)
14 Nm (1.4 m•kg, 10 ft•lb)
10 Nm (1.0 m•kg, 7.2 ft•lb)
Extent of removal Order Part name Q’ty Remarks
CRANKCASE AND CRANKSHAFT
REMOVAL
Preparation for Engine Refer to “ENGINE REMOVAL” section.
removal Piston Refer to “CYLINDER HEAD, CYLINDER
AND PISTON” section.
Primary drive gear
Kick idle gear
Refer to “KICK AXLE, SHIFT SHAFT AND
Stopper lever
PRIMARY DRIVE GEAR” section.
Rotor and stator Refer to “CDI MAGNETO” section.
1 Segment 1 Refer to “REMOVAL POINTS”.
2 Holder 2
Except for USA and CDN
3 Bolt (Neutral switch lead holder) 1
4 Bolt [L=50 mm (1.97 in)] 7
5 Bolt [L=60 mm (2.36 in)] 1
6 Bolt [L=70 mm (2.76 in)] 3
7 Holder 2
8 Crankcase (right) 1 Use special tool.
9 Crankcase (left) 1 Refer to “REMOVAL POINTS”.
10 Crankshaft 1 Use special tool.
Refer to “REMOVAL POINTS”.
11 Oil seal 2
12 Bearing 2 Refer to “REMOVAL POINTS”.
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