Kawasaki WORKHORSE 250 (2003) [90/322] Valve seat surface width
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Kawasaki WORKHORSE 250 (2003) [90/322] Valve seat surface width

Kawasaki WORKHORSE 250 (2003) [90/322] Valve seat surface width
4-26 ENGINE TOP END
Valves, Guides, Seats, Springs, Oil Seals
Valve Seat Inspection
•
Remove the valve (see Valve Removal).
•
Check the valve s eat width [A].
○
Measure the seat width of the portion where there is no
build-up carbon (white portion) of the valve seat with
vernier calipers.
Valve Seat Surface Width
Exhaust:
0.5 ∼ 1.0 mm (0.02 ∼ 0.04 in.)
Inlet:
0.5 ∼ 1.0 mm (0.02 ∼ 0.04 in.)
If the valve seat width is not within the specified range,
repair the valve seat.
•
Measure the outside diameter [B] of the seating pattern
on the valve seat.
Good [C]
Too Wide [D]
Too Narrow [E]
Uneven [F]
If the outside diameter of the valve seating pattern is too
large or too small, repair the valve seat.
Valve Seat Surface Outside Diameter
Exhaust:
26.9 ∼ 27.1 mm (1.059 ∼ 1.067 in.)
Inlet:
30.9 ∼ 31.1 mm (1.217 ∼ 1.224 in.)
Valve Seat Repa ir (Valve Lapping)
•
Using the valve seat cutters, repair the valve seat.
Special Tools - Valve Seat Cutter, 45° - 30: 57001-1187
Valve Seat Cutter, 45° -
35: 57001-1116
Valve Seat Cutter, 32° -
35: 57001-1121
Valve Seat Cutter, 60° -
30: 57001-1123
Valve Seat Cutter, 60° -
41: 57001-1124
Valve Seat Cutter Holder,
5.5: 57001-1125
Valve Seat Cutter Holder Bar: 57001-1128
If the manufacturer’s instructions are not available, use
the following procedure.

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