Yamaha XT660R Service Manual page 30

Item
Camshaft
Drive system
Intake camshaft lobe dimensions
Measurement A
Measurement B
Exhaust camshaft lobe dimensions
Measurement A
Measurement B
Valve timing
Intake - open (B.T.D.C.)
Intake - closed (A.B.D.C.)
Exhaust - open (B.B.D.C.)
Exhaust - closed (A.T.D.C.)
Overlap angle "A"
Maximum camshaft runout
Timing chain
Model/number of links
Tensioning system
ENGINE SPECIFICATIONS
Chain drive (left)
A
B
43.488 ~ 43.588 mm (1.7121 ~ 1.7161 in) 43.338 mm
36.959 ~ 37.059 mm (1.4551 ~ 1.4590 in) 36.840 mm
A
B
43.129 ~ 43.229 mm (1.6980 ~ 1.7019 in) 42.983 mm
37.007 ~ 37.107 mm (1.4570 ~ 1.4609 in) 36.886 mm
25°
55°
60°
20°
45°
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98 × RH2010/126
Automatic
2 - 4
Standard
SPEC
Limit
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(1.7062 in)
(1.4504 in)
(1.6922 in)
(1.4522 in)
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0.040 mm
(0.0016 in)
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