Yamaha TW200 Service Manual page 27

Model
MAINTENANCE SPECIFICATIONS I
SPEC
I
fJ
71
TW200T/TC
Valve, Valve Seat, Valve Guide:
Valve Clearance (Cold):
IN. 0.05-0.09 mm (0.002-0.004 in)
EX. 0.11-0.15 mm (0.004-0.006 in)
Valve Dimensions:
"A"
Margin Thickness
I I
A" Head Diameter:
IN. 33.9-34.1 mm (1.33-1.34 in)
EX.
28.4-28.6 mm (1.12-1.13 in)
liB"
Face Width:
IN.
2.26 mm (0.089 in)
EX. 2.26 mm (0.089 in)
"C" Seat Width: IN. 0.9 - 1.1 mm (0.035 - 0.043 in)
EX. 0.9 - 1.1 mm (0.035 - 0.043 in)
"0" Margin Thickness Limit: IN. 0.8-1.2 mm (0.032-0.047 in)
EX. 0.8-1.2 mm (0.032-0.047 in)
Stem Outside Diameter: IN.
5.975-5.990 mm (0.235-0.236 in)
EX.
5.960-5.975 mm (0.234-0.235 in)
Guide Inside Diameter: IN.
6.000-6.012 mm (0.236-0.237 in)
EX.
6.000-6.012 mm (0.236-0.237 in)
Stem-to-guide Clearance:
IN. 0.010-0.037 mm (0.0004-0.0015 in)
EX. 0.025 - 0.052 mm (0.001 - 0.002 in)
Valve Face Material: Stellite
Valve Seat Width:
IN. 0.9 - 1.1 mm (0.035 - 0.043 in)
EX.
0.9 - 1.1 mm (0.035 - 0.043 in)
Valve Seat Material:
IN.
PB7W
EX.
PB7W
Stem Runout Limit:
<
0.01
mm
(0.0004 in)
>
Valve Spring:
Free Length:
Inner Spring
Outer Spring
/
IN. 36.2
mm
(1.43 in)
EX. 36.2 mm (1.43 in)
IN. 36.6
mm
(1.44 in)
EX. 36.6 mm (1.44 in)
2-5