3-24 ENGINE
VALVE SEAT SERVICING
The valve seats for both the intake and exhaust valves are
machined to three different angles. The seat contact surface is
cut at 45°.
For USA
& Valve seat cutter: N-114, N-121 and N-128
Solid pilot: N-100-5.0
For the other countries
& 09916-21110: Valve seat cutter set
09916-22420: Cutter N-128
09916-22430: Cutter N-114
09916-20610: Cutter N-121
09916-24311: Solid pilot N-100-5.0
NOTE:
Use the solid pilot N-100-5.0 along with the valve seat cutters
N-114, N-121, and N-128.
"
• When installing the solid pilot
1 rotate it slightly.
• Seat the pilot snugly. Install the 45° cutter
2, attachment and
T-handle.
Intake Exhaust
45° N-128 N-128
15°—N-121
30° N-128 —
60° N-114 N-114
The valve seat contact area must be inspected after
each cut.
45˚
30˚
15˚
60˚
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