Yamaha FZ 25 2021 Supplementary Service Manual page 40

MAINTENANCE SPECIFICATION (ENGINE)
Camshaft
Camshaft lobe dimensions
Lobe height (Intake)
Limit
Lobe height (Exhaust)
Limit
Camshaft runout limit
Rocker arm/rocker arm shaft
Rocker arm inside diameter
Limit
Rocker arm shaft outside diameter
Limit
Valve, valve seat, valve guide
Valve clearance (cold)
Intake
Exhaust
Valve dimensions
Valve seat contact width (intake)
Limit
Valve seat contact width (exhaust)
Limit
Valve stem diameter (intake)
Limit
Valve stem diameter (exhaust)
Limit
Valve guide inside diameter (intake)
Valve guide inside diameter (exhaust)
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (exhaust)
Limit
Valve stem runout
Valve spring
Inner spring
Free length (intake)
Limit
Free length (exhaust)
Limit
Outer spring
Free length (intake)
Limit
Free length (exhaust)
Limit
36.890–36.990 mm (1.4524–1.4563 in)
36.790 mm (1.4484 in)
36.891–36.991 mm (1.4524–1.4563 in)
36.791 mm (1.4485 in)
0.030 mm (0.0012 in)
12.000–12.018 mm (0.4724–0.4731 in)
12.033 mm (0.4737 in)
11.981–11.991 mm (0.4717–0.4721 in)
11.950 mm (0.4705 in)
0.05–0.10 mm (0.0020–0.0039 in)
0.08–0.13 mm (0.0032–0.0051 in)
0.90–1.20 mm (0.0354–0.0472 in)
1.7 mm (0.07 in)
0.90–1.20 mm (0.0354–0.0472 in)
1.7 mm (0.07 in)
5.975–5.990 mm (0.2352–0.2358 in)
5.950 mm (0.2343 in)
5.960–5.975 mm (0.2346–0.2352 in)
5.930 mm (0.2335 in)
6.000–6.012 mm (0.2362–0.2367 in)
6.000–6.012 mm (0.2362–0.2367 in)
0.010–0.037 mm (0.0004–0.0015 in)
0.080 mm (0.0032 in)
0.025–0.052 mm (0.0010–0.0020 in)
0.100 mm (0.0039 in)
0.010 mm (0.0004 in)
36.17 mm (1.42 in)
34.36 mm (1.35 in)
36.17 mm (1.42 in)
34.36 mm (1.35 in)
36.63 mm (1.44 in)
34.79 mm (1.37 in)
36.63 mm (1.44 in)
34.79 mm (1.37 in)
2-3
SPEC