Honda FQ650, Manual

Page: 89 / 130

CYLINDER HEAD
12-8
PUSH ROD RUNOUT
Check both ends of the push rod for wear.
Check the push rod for straightness.
If necessary, replace the push rod.
VALVE GUIDE REPLACEMENT
Chill the replacement valve guides in the freezer
section of a refrigerator for about an hour.
Use a hot plate or oven to heat the cylinder head evenly
to 150°C (300°F).
• Do not use a torch to heat the cylinder head;
warpage of the cylinder head may result.
• Do not get the cylinder head hotter than 150°C
(300°F); excessive heat may loosen the valve seat.
Remove the heated cylinder head from the hot plate
and support it with wooden blocks.
Drive the valve guides [1] out of the cylinder head from
the combustion chamber side.
• When driving the valve guides out, be careful not to
damage the cylinder head.
To avoid burns, use heavy gloves when handling
the heated cylinder head.
TOOL:
Valve guide driver, 5.5 mm [2] 07742-0010100
[1]
[2]