Yamaha WR450F, Owner'S Service Manual

Page: 386 / 794

4 - 33
ENG
CYLINDER HEAD
CYLINDER HEAD
CYLINDER HEAD
Extent of removal:
1
Cylinder head removal
NOTE:
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.
Extent of removal Order Part name Q’ty Remarks
CYLINDER HEAD REMOVAL
Preparation for removal Seat and fuel tank Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section.
Exhaust pipe and silencer Refer to “EXHAUST PIPE AND
SILENCER” section.
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 Dowel pin 2
6 Timing chain guide (front) 1
1