Suzuki GZ250 Marauder Service Manual page 64

• After installing the valve guides, re-finish their guiding
bores using the special tools. Be sure to clean and oil
the guides after reaming.
09916-34550: Valve guide reamer (5.5 mm)
09916-34542: Handle
VALVE SEAT WIDTH
• Coat the valve seat uniformly with Prussian blue. Install
the valve and attach a valve lapper onto it. Tap the
coated seat with the valve face in a rotating manner, in
order to obtain a clear impression of the seating contact.
• The ring-like dye impression left on the valve face must
be continuous without any breaks. In addition, the width
of the dye ring, which is the valve seat width, must be
within the following specification:
Standard
Valve seat width
If the valve seat is out of specification, re-cut the seat.
VALVE SEAT SERVICE
The valve seats for both intake and exhaust valves are ma-
chined to two different angles. (The seat contact surface is
cut 45°.)
45°
15°
09916-21111: Valve seat cutter set
09916-20610: Valve seat cutter (N-121)
09916-20620: Valve seat cutter (N-122)
09916-24450: Solid pilot (N-100-5.52)
NOTE:
The valve seat contact area must be inspected after each
cut.
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: 0.9-1.1 mm (0.035-0.043 in)
INTAKE SIDE
N-122 45°
N-121 15°
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EXHAUST SIDE
N-122
N-121
ENGINE 3-28