Kawasaki STX-15F - Manual (Page 204)

6-26 ENGINE TOP END
Valves
Valve Seat Inspection
•
Remove the valve (see Valve Removal).
•
Check the valve seating surface [A] between the valve [B]
and valve seat [C].
○
Measure the outside diameter [D] of the seating pattern
on the valve seat.
If the outside diameter is too large or too small, repair the
seat (see Valve Seat Repair).
Valve Seating Surface Outside Diameter
Standard:
Exhaust 27.6 ∼ 27.8 mm (1.087 ∼ 1.094 in.)
Inlet 32.6 ∼ 32.8 mm (1.283 ∼ 1.291 in.)
○
Measure the seat width [E] of the portion where there is
no build-up carbon (white portion) of the valve seat with a
vernier caliper.
Good [F]
If the width is too wide [G], too narrow [H] or uneven [J],
repair the seat (see Valve Seat Repair).
Valve Seating Surface Width
Standard:
Exhaust 0.8 ∼ 1.2 mm (0.03 ∼ 0.047 in.)
Inlet 0.5 ∼ 1.0 mm (0.02 ∼ 0.039 in.)
Valve Seat Repair
•
Repair the valve seat with the valve seat cutters [A].
Special Tools-
Valve Seat Cutter Holder, 5:
57001-1208 [B]
Valve Seat Cutter Holder Bar:
57001-1128 [C]
[For Inlet Valve Seat]
Valve Seat Cutter, 45° - 35:
57001-1116
Valve Seat Cutter, 32° -
35:
57001-1121
Valve Seat Cutter, 55° -
35:
57001-1247
[For Exhaust Valve Seat]
Valve Seat Cutter, 45° - 30:
57001-1187
Valve Seat Cutter, 32° -
30:
57001-1120
Valve Seat Cutter, 60° -
30:
57001-1123
If the manufacturer’s instructions are not available, use
the following procedure.