6. CYLINDER HEAD/VALVES STRYKER 125/150
Use a 63.5° cutter to remove the lower
existing valve seat material.
Old Seat Width
Install a 45° finish cutter and cut the seat to
the proper width.
Standard Seat Width: 1.0mm
Inspect the valve seat contact area.
If the contact area is too high on the valve, Contact too High
the seat must be lowered using a 37.5°
cutter.
If the contact area is too low on the valve,
the seat must be raised using a 63.5° cutter. Old Seat Width
Refinish the seat to specifications using a
45° seat cutter.
After cutting the seat, apply emery to each
valve contact face and lap the valve using a
lapper.
6-13
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