ENGINE 3-31
% Valve seat width
W
Standard: 0.9 – 1.1 mm (0.035 – 0.043 in)
( 09916-10911: Valve lapper set
If either requirement is not met, correct the seat by servicing it
as follows:
VALVE SEAT SERVICING
The valve seats for intake and exhaust valves are machined to
two different angles. The seat contact surface is cut at 45°.
NOTE:
The valve seat contact area must be inspected after each cut.
( 09916-21111: Valve seat cutter set
09916-24900: Valve seat cutter set
09916-22410: Solid pilot (N-140-5.0)
09916-24311: Solid pilot (N-100-5.0)
09916-24935: Valve seat cutter (N-608)
• Insert the solid pilot
1 (09916-24311: N-100-5.0) with a slight
rotation. Seat the pilot snugly.
INTAKE EXHAUST
15° N-212 N-121
45° N-608 N-608
Valve seat
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