Yamaha XT660Z 2008 Service Manual page 28

Exhaust B
Limit
Exhaust (depth)
Camshaft runout limit
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"
Timing chain
Model/number of links
Tensioning system
Rocker arm/rocker arm shaft
Rocker arm inside diameter
Limit
Rocker arm shaft outside diameter
Limit
Rocker-arm-to-rocker-arm-shaft clearance
Limit
Valves, valve seats, valve guides
Valve clearance (cold)
Intake
Exhaust
Valve dimensions
Valve head diameter A (intake)
Valve head diameter A (exhaust)
A
ENGINE SPECIFICATIONS
37.007-37.107 mm (1.4570-1.4609 in)
36.907 mm (1.4530 in)
6.179 mm (0.2432 in)
0.030 mm (0.0012 in)
25°
55°
60°
20°
45°
98 x RH2010/126
Automatic
12.000-12.018 mm (0.4724-0.4731 in)
12.036 mm (0.4739 in)
11.981-11.991 mm (0.4717-0.4721 in)
11.955 mm (0.4707 in)
0.009-0.037 mm (0.0004-0.0015 in)
0.081 mm (0.0032 in)
0.09-0.13 mm (0.0035-0.0051 in)
0.16-0.20 mm (0.0063-0.0079 in)
37.90-38.10 mm (1.4921-1.5000 in)
31.90-32.10 mm (1.2559-1.2638 in)
2-4