Honda TRX450R Service Manual page 214

CYLINDER HEAD/VALVE
NOTICE
Take care not to tilt
or lean the reamer
in the guide while
reaming.
Use cutting oil on
the reamer during
this operation.
Using a torch to heat the cylinder head may cause
warpage.
Support the cylinder head and drive the valve
guides out of the cylinder head from the combus-
tion chamber side using the special tool.
TOOL:
Valve guide driver, 5.5 mm
After '05; EX:
Valve guide driver, 5.0 mm
07742-0010100
07942-MA60000
VALVE GUIDE
DRIVER
Remove the guides from the freezer.
While the cylinder head is still heated, drive new
valve guides into the cylinder head from the cam-
shaft side until the exposed height is at the specified
value (at the mark).
TOOL:
Valve guide driver, 5.5 mm
After '05; EX:
Valve guide driver
07742-0010100
07743-0020000
not available in U.S.A
VALVE GUIDE PROJECTION:
'04 - '05;
IN: 16.8 - 17.2 mm (0.66 - 0.68 in)
EX: 17.9 - 18.3 mm (0.70 - 0.72 in)
After '05;
IN: 16.1 - 16.3 mm (0.63 - 0.64 in)
EX: 17.9 - 18.1 mm (0.70 - 0.71 in)
Let the cylinder head cool to room temperature.
Ream the new valve guides.
Insert the reamer from the combustion chamber
side of the cylinder head and always rotate the
reamer clockwise.
TOOL:
Valve guide reamer, 5.5 mm
After '05; EX:
Valve guide reamer, 5.0 mm
07984-2000001 or
07984-200000D
(U.S.A. only)
07984-MA60001 or
07984-MA6000D
(U.S.A. only)
VALVE
GUIDE
REAMER
Clean the cylinder head thoroughly to remove any
metal particles after reaming and reface the valve
seat (page 11-20).
11-19