Yamaha SR400 2014 Service Manual page 30

Camshaft
Drive system
Camshaft lobe dimensions
Lobe height (Intake)
Limit
Base circle diameter (Intake)
Limit
Lobe height (Exhaust)
Limit
Base circle diameter (Exhaust)
Limit
Camshaft runout limit
Timing chain
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
Valve, valve seat, valve guide
Valve clearance (cold)
Intake
Exhaust
Valve dimensions
Valve head diameter (intake)
Valve head diameter (exhaust)
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)
Limit
Valve guide inside diameter (exhaust)
Limit
Valve-stem-to-valve-guide clearance (intake)
Limit
Valve-stem-to-valve-guide clearance (ex-
haust)
Limit
Valve stem runout
Valve spring
Inner spring
Free length (intake)
Limit
Free length (exhaust)
ENGINE SPECIFICATIONS
Chain drive (right)
38.860–38.960 mm (1.5299–1.5339 in)
38.850 mm (1.5295 in)
32.170–32.270 mm (1.2665–1.2705 in)
32.160 mm (1.2661 in)
38.890–38.990 mm (1.5311–1.5350 in)
38.880 mm (1.5307 in)
32.210–32.310 mm (1.2681–1.2720 in)
32.200 mm (1.2677 in)
0.010 mm (0.0004 in)
Manual
12.000–12.018 mm (0.4724–0.4731 in)
12.033 mm (0.4737 in)
11.985–11.991 mm (0.4718–0.4721 in)
11.954 mm (0.4706 in)
0.009–0.033 mm (0.0004–0.0013 in)
0.07–0.12 mm (0.0028–0.0047 in)
0.12–0.17 mm (0.0047–0.0067 in)
47.00–47.20 mm (1.8504–1.8583 in)
39.00–39.20 mm (1.5354–1.5433 in)
1.30 mm (0.0512 in)
1.6 mm (0.06 in)
1.30 mm (0.0512 in)
1.6 mm (0.06 in)
7.975–7.990 mm (0.3140–0.3146 in)
7.945 mm (0.3128 in)
7.960–7.975 mm (0.3134–0.3140 in)
7.930 mm (0.3122 in)
8.010–8.019 mm (0.3154–0.3157 in)
8.057 mm (0.3172 in)
8.010–8.019 mm (0.3154–0.3157 in)
8.057 mm (0.3172 in)
0.020–0.044 mm (0.0008–0.0017 in)
0.080 mm (0.0032 in)
0.035–0.059 mm (0.0014–0.0023 in)
0.100 mm (0.0039 in)
0.030 mm (0.0012 in)
45.30 mm (1.78 in)
43.00 mm (1.69 in)
45.30 mm (1.78 in)
2-3