Yamaha YZF-R1 Series Service Manual page 42

Spark plug(s)
Manufacturer/model
Spark plug gap
Cylinder head
Warpage limit
Camshaft
Camshaft cap inside diameter
Camshaft journal diameter
Camshaft-journal-to-camshaft-cap clearance
Limit
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)
ENGINE SPECIFICATIONS
NGK/LMAR9E-J
0.6–0.7 mm (0.024–0.028 in)
0.10 mm (0.0039 in)
25.500–25.521 mm (1.0039–1.0048 in)
25.459–25.472 mm (1.0023–1.0028 in)
0.028–0.062 mm (0.0011–0.0024 in)
0.080 mm (0.0032 in)
35.291–35.391 mm (1.3894–1.3933 in)
35.191 mm (1.3855 in)
34.745–34.845 mm (1.3679–1.3718 in)
34.645 mm (1.3640 in)
0.050 mm (0.0020 in)
7.987–8.002 mm (0.3144–0.3150 in)
8.017 mm (0.3156 in)
7.967–7.979 mm (0.3137–0.3141 in)
7.936 mm (0.3124 in)
0.09–0.17 mm (0.0035–0.0067 in)
0.18–0.23 mm (0.0071–0.0091 in)
0.90–1.10 mm (0.0354–0.0433 in)
1.6 mm (0.06 in)
1.10–1.30 mm (0.0433–0.0512 in)
1.8 mm (0.07 in)
4.975–4.990 mm (0.1959–0.1965 in)
4.960 mm (0.1953 in)
4.460–4.475 mm (0.1756–0.1762 in)
4.425 mm (0.1742 in)
5.000–5.012 mm (0.1969–0.1973 in)
4.500–4.512 mm (0.1772–0.1776 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)
34.52 mm (1.36 in)
32.79 mm (1.29 in)
36.94 mm (1.45 in)
2-3