Yamaha MZ125 Service Manual page 17

Model name
Model code number
Valve:
Valve dimension
Head diameter
"A"
IN
EX
Stem diameter
"B"
IN
EX
Stem length "C"
IN
EX
Valve face contact
width "D"
IN
EX
<Limit>
IN
EX
"θ"
Valve guide
Guide inside diameter
IN
EX
Stem to guide clearance
IN
EX
Valve clearance (cold)
IN
EX
Push rod:
Vend limit
MAINTENANCE SPECIFICATIONS
MZ125
7CL
mm (in)
C
B
A
21.0 (0.83)
θ
19.0 (0.75)
64.5 (2.54)
64.5 (2.54)
mm (in)
MZ125R MZ175
7CN
24.0 (0.94)
5.5 (0.22)
5.5 (0.22)
0.7 (0.028)
0.7 (0.028)
1.7 (0.067)
1.7 (0.067)
90°
5.5 (0.22)
5.5 (0.22)
0.04–0.06 (0.0016–0.0024)
0.06–0.08 (0.0024–0.0031)
0.1 (0.0039)
0.1 (0.0039)
0.5 (0.02)
3-5
SPEC
MZ175R MZ200
7DH
26.0 (1.02)
22.0 (0.87)
65.9 (2.59)
66.2 (2.61)
MZ200R