Valve And Seat Condition, Valve Seat Width; Valve Seat Servicing - Suzuki DR350 Service Manual

] ·19 ENGINE
• Lubricate each stem seal with engine oil .and install the
seal.
CAUTION:
Install the new stem seals.
VALVE AND SEAT CONDITION
VALVE SEAT WIDTH
Coat the valve seat with prussia" blue uniformly. Fit the
valve and tap the coated seat with the valve face in a rotat·
ing manner, in order to obtain a clear impression o f the seat-
ing contact. In this operation , use the lapper to hold the valve
head.
The ring-like dye impression left on the valve face must be
continuous-without any break. In addition , the width of the
dye ring. which is the visualized seat "width ", must be wi·
thin the specifica tion .
V alve sea t width
STD .
® :
0 .9 - 1 .1 mm 10 .035 - 0 .043 inl
If ei ther requirem en t is not met, co rrec t the seat by se r vic-
ing it as follows .
VALVE SEAT SERVICING
The valve seats for both intake and exhaust valves are an·
gled to present two bevels . 15° and 45 °
INTAKE SIDE EXHAUST SIDE
45 ·
N· 116 or N· l22
N· 1160rN· 122
15 · N· 1160rN· 12 1 N· 116 or N· 121
09916· 20610 : Valve seat cutter head (N · 121)
09916·20620 : Valve seat cutter head (N· 122)
09916·24420 : Valve seat cutter head (N · l 1 61
09916· 24311 : Solid pilot IN -l00· 5 .01
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