Honda SH300I 2006, Manual

Page: 230 / 511

CYLINDER HEAD/VALVES
9-14
CAM CHAIN GUIDE/TENSIONER SLIDER
Check the cam chain tensioner slider in the crank-
case for excessive wear or damage.
Check the cam chain guide for excessive wear or
damage.
VALVE GUIDE REPLACEMENT
Mark new valve guides at the specified height indi-
cated below, using a marker.
Chill new valve guides in a freezer for about 1 hour.
Be sure to wear
heavy gloves to
avoid burns when
handling the heated
cylinder head.
Heat the cylinder head to 130 – 140
°
C (275 – 290
°
F)
with a hot plate or oven. Use temperature indicator
sticks, available from welding supply stores, to be
sure the cylinder head is heated to the proper tem-
perature
• 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.
Take out new valve 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).
Let the cylinder head cool to room temperature.
CHAIN GUIDE
TENSIONER SLIDER
TOOL:
Valve guide driver, 4.3 mm
07HMD-ML00101
VALVE GUIDE
DRIVER
TOOL:
Valve guide driver, 4.3 mm
07HMD-ML00101
VALVE GUIDE PROJECTION:
IN: 11.20 – 11.50 mm (0.441 – 0.453 in)
EX: 12.20 – 12.50 mm (0.480 – 0.492 in)
VALVE GUIDE
DRIVER