2-4
MAINTENANCE SPECIFICATIONS
Timing chain:
Timing chain type/No. of links
98XRH2010-118M/118
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Timing chain adjustment method
Automatic
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Valve, valve seat, valve guide:
Valve clearance (cold)
IN
0.10–0.15 mm (0.0039–0.0059 in)
----
EX
0.20–0.25 mm (0.0079–0.0098 in)
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Valve dimensions:
"A" head diameter (IN)
26.9–27.1 mm (1.0591–1.0669 in)
----
"A" head diameter (EX)
27.9–28.1 mm (1.0984–1.1063 in)
----
"B" face width (IN)
2.26 mm (0.089 in)
----
"B" face width (EX)
2.26 mm (0.089 in)
----
"C" seat width (IN)
0.9–1.1 mm (0.0354–0.0433 in)
1.6 mm (0.0630
in)
"C" seat width (EX)
0.9–1.1 mm (0.0354–0.0433 in)
1.6 mm (0.0630
in)
"D" margin thickness (IN)
1 mm (0.0394 in)
0.85 mm (0.033
in)
"D" margin thickness (EX)
1 mm (0.0394 in)
0.85 mm (0.033
in)
Stem outside diameter (IN)
4.475–4.490 mm (0.1762–0.1768 in)
4.445 mm
(0.1750 in)
Stem outside diameter (EX)
4.965–4.980 mm (0.1955–0.1961 in)
4.935 mm
(0.1943 in)
Guide inside diameter (IN)
4.500–4.512 mm (0.1772–0.1776 in)
4.550 mm
(0.1791 in)
Guide inside diameter (EX)
5.000–5.012 mm (0.1969–0.1973 in)
5.050 mm
(0.1988 in)
Item
Standard
Limit
Summary of Contents for YZ450F(Y)
Page 4: ......
Page 39: ...2 17 LUBRICATION DIAGRAMS 1 Intake camshaft 2 Exhaust camshaft A To main axle B From oil pump ...
Page 59: ...3 13 ENGINE INTAKE EXHAUST ...
Page 91: ...4 21 CYLINDER HEAD 3 Install Bolt cylinder head 1 Bolt cylinder head 10 Nm 1 0 m kg 7 2 ft lb ...
Page 110: ...4 40 OIL PUMP 15 Oil pump drive shaft 1 16 Rotor housing 1 Order Part name Q ty Remarks ...
Page 189: ......