Yamaha XZ550RJ Service Manual page 421

Model
Valve, Valve Seat, Valve Guide
Valve Clearance (Cold)
Valve Dimensions
"A" Head Dia.
"B" Face Width
IN.
EX.
! \ '
~ " B "
Face Width~
IN.
EX.
IN.
EX.
"C" Seat Limit Width IN.
EX.
"D" Margin Thickness Limit
IN.
EX.
Stem Outside Diameter
Guide Inside Diameter
Stem-to-guide Clearance
Stem Runout Limit
IN.
EX.
IN.
EX.
IN.
EX.
Valve Seat Width Standard
0.11 - 0.15 mm I0.0043 -0.0059 in)
0.16 -0.20mm I0.0063 -0.0079 in)
"D"
I\ .
~ C "
,----._l
Seat Width
31 mm (1.22inJ
26mm (1.02in)
2.3 mm (0.09 in)
2.3 mm 10.09 in)
1
±
0.1 mm I0.04
±
0.004 in)
1
±
0.1 mm I0.04
±
0.004 in)
1
±
0.2 mm (0.04
±
0.008 in)
1 ± 0.2 mm I0.04 ± 0.008 in)
e:ggigmm
(0.24=8W,ain)
6=8~8mm
(0.24:gggJgin)
5--go12mm
(0.24·1ooosin)
5+go12mm (0.24+gooosin)
Margin Thickness
0.010 -0.037 mm (0.0004 -0.0015 in)
0.025 -0.052 mm 10.0010 -0.0020 in)
<0.01 mm I0.0004 in)>
1
±
0.1 mm (0.039
±
0.0039 in)
8-6
XZ550RJ