Maintenance Specifications - Yamaha WR450F Manuel D'atelier Du Proprietaire

Cam chain:
Cam chain type/No. of links
Cam chain adjustment method
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
Stem runout limit

MAINTENANCE SPECIFICATIONS

Item
IN
EX
B
Face Width
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
IN
EX
Standard
98XRH2010-118M/118
Automatic
0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)
0.20 ~ 0.25 mm
(0.0079 ~ 0.0098 in)
C
Seat Width
26.9 ~ 27.1 mm
(1.0591 ~ 1.0669 in)
27.9 ~ 28.1 mm
(1.0984 ~ 1.1063 in)
2.26 mm (0.089 in)
2.26 mm (0.089 in)
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
0.9 ~ 1.1 mm
(0.0354 ~ 0.0433 in)
1 mm (0.0394 in)
1 mm (0.0394 in)
4.475 ~ 4.490 mm
(0.1762 ~ 0.1768 in)
4.965 ~ 4.980 mm
(0.1955 ~ 0.1961 in)
4.500 ~ 4.512 mm
(0.1772 ~ 0.1776 in)
5.000 ~ 5.012 mm
(0.1969 ~ 0.1973 in)
0.010 ~ 0.037 mm
(0.0004 ~ 0.0015 in)
0.020 ~ 0.047 mm
(0.0008 ~ 0.0019 in)
----
2 - 5
SPEC
Limit
----
----
----
----
D
Margin Thickness
----
----
----
----
1.6 mm
(0.0630 in)
1.6 mm
(0.0630 in)
0.85 mm
(0.033 in)
0.85 mm
(0.033 in)
4.445 mm
(0.1750 in)
4.935 mm
(0.1943 in)
4.550 mm
(0.1791 in)
5.050 mm
(0.1988 in)
0.08 mm
(0.003 in)
0.10 mm
(0.004 in)
0.01 mm
(0.0004 in)