Yamaha 2000 YFM400FWA Service Manual page 28

Cam chain:
Cam chain type/No. of links
Cam chain adjustment method
Rocker arm/rocker arm shaft:
Shaft outside diameter
Arm-to-shaft clearance
Valve, valve seat, valve guide:
Valve clearance (cold)
Valve dimensions
A
Head Diameter
"A" head diameter
"B" face width
"C" seat width
"D" margin thickness
Stem outside diameter
Guide inside diameter
Stem-to-guide clearance
MAINTENANCE SPECIFICATIONS
Item
IN
EX
B
Face Width
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
Standard
92RH2015/116
Automatic
11.981 ~ 11.991 mm
(0.4717 ~ 0.4721 in)
0.009 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
0.06 ~ 0.10 mm
(0.0024 ~ 0.0039 in)
0.16 ~ 0.20 mm
(0.0063 ~ 0.0079 in)
C
Seat Width
39.9 ~ 40.1 mm
(1.5708 ~ 1.5787 in)
33.9 ~ 34.1 mm
(1.3346 ~ 1.3425 in)
2.26 mm (0.0890 in)
2.26 mm (0.0890 in)
1.2 ~ 1.4 mm
(0.0472 ~ 0.0551 in)
1.2 ~ 1.4 mm
(0.0472 ~ 0.0551 in)
1.0 ~ 1.4 mm
(0.0394 ~ 0.0551 in)
0.8 ~ 1.2 mm
(0.0314 ~ 0.0472 in)
6.975 ~ 6.990 mm
(0.2746 ~ 0.2752 in)
6.955 ~ 6.970 mm
(0.2738 ~ 0.2744 in)
7.000 ~ 7.012 mm
(0.2756 ~ 0.2761 in)
7.000 ~ 7.012 mm
(0.2756 ~ 0.2761 in)
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
0.030 ~ 0.057 mm
(0.0012 ~ 0.0022 in)
2 - 6
SPEC
Limit
----
----
11.951 mm
(0.4705 in)
0.08 mm
(0.0031 in)
----
----
D
Margin Thickness
----
----
----
----
1.6 mm
(0.0630 in)
1.6 mm
(0.0630 in)
----
----
6.950 mm
(0.2736 in)
6.915 mm
(0.2722 in)
7.030 mm
(0.2768 in)
7.030 mm
(0.2768 in)
0.08 mm
(0.0031 in)
0.10 mm
(0.0039 in)