Valve Seat Width Measurement; Valve Seat Servicing - Suzuki GS850G Service Manual

Valve guide-valve stem clearance
Valve Srnntlxrd
Limit
Intake
155 mrn
0.35
mm
valver:
,1D22
~ n )
(0.014 in)
E x h a u ~ i
o.rwo-o.n;.n
m m 0.35
mm
vaI5.e~:
(I1.1Xllh-O IY)28 in) (O.IE14 in1
1
Valve stem O.D.
Star
274h in)
h.945-6.960
m m (0.2734-0.1'40
in)
Valve guide
I.D.
The ring-like dye impression
left
on thc
valve
face must be continuous-wi thozit any
break-and.
i n
addition
to this rcquirc-
merit.
the width
of
the
dye
ring. which is
the
visualized
seat
"\vidthv. must h e within the
following specification:
Standard
Valve
seat
width
Standard
@
1.0-1.2mm10.04-0.05in)
If
either requirement is
n o t
met.
correct
the
seat by servicing it
as follows:
a
Fig. 7-73
ALVE SEAT SERVICING
Fig, 7-76
The
valve seats
for hot11 intake
nna
exnnust
valvcs are angled
( 0
present three
hcvtlls.
15" (hottorn).
4S0
Inriddle) nncl 75" (top).
VALVE SEAT WTDTH MEASUREMENT
Coat the
valve
seat with Pnissian blue
uniformly. Fit the
valve: and
tap the coated
seat
with the valve face in a rotating
manner. in order to obtain a clear im-
pression of the seating contact. In this
operation.
use
the
valve
lapper
to hold the
valve head.
To refnce the
seat.
proceed as folloiv~:
Valve
sent cutter set 90
103-3501 1