Yamaha WR450F(Y) 2009, Owner'S Service Manual

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CYLINDER HEAD
CYLINDER HEAD
REMOVING THE CYLINDER HEAD
Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb) in the proper tightening sequence, remove and retighten the
cylinder head bolts to 20 Nm (2.0 m•kg, 14 ft•lb) in the proper tightening sequence, and then tighten the cylinder head bolts
further to reach the specified angle 180° in the proper tightening sequence.
Order Part name Q'ty Remarks
Seat and fuel tank
Refer to "REMOVING THE SEAT, FUEL
TANK AND SIDE COVERS" section in the
CHAPTER 3.
Exhaust pipe and silencer
Refer to "REMOVING THE EXHAUST PIPE
AND SILENCER" section in the CHAPTER 3.
Radiator Refer to "RADIATOR" section
Air cut-off valve assembly Refer to "AIR INDUCTION SYSTEM" section.
Carburetor Refer to "CARBURETOR" section.
Camshaft Refer to "CAMSHAFTS" section.
1 Bolt 2
2* Bolt 4 Refer to NOTE.
3 Cylinder head 1
4 Gasket 1
5 Timing chain guide (exhaust side) 1