Yamaha YZ250 2005 Manuel D'atelier Du Proprietaire page 278

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CYLINDER HEAD, CYLINDER AND PISTON
4. Install:
9 Push rod 1
9 Bolt (push rod) 2
NOTE:
9 Insert the set pin 3 included in owner's tool kit
to install the bolt (push rod).
9 Do not forget to remove the set pin.
cC
Be sure to use the set pin. If the set pin is
not used, the power valve constituent parts
will result in damage.
5. Install:
9 Gasket (power valve housing)
9 Power valve housing 1
9 Bolt (power valve housing) 2
6. Install:
9 O-ring 1
9 Dowel pin 2
NOTE:
Apply the lithium soap base grease on the O-
rings.
7. Install:
9 Cylinder head 1
9 Copper washer 2
9 Nut (cylinder head) 3
NOTE:
Tighten the nuts (cylinder head) in stage, using a
crisscross pattern.
4-31
ENG
5 Nm (0.5 m•kg, 3.6 ft•lb)
5 Nm (0.5 m•kg, 3.6 ft•lb)
25 Nm (2.5 m•kg, 18 ft•lb)

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Yz250v 2005

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