Yamaha R15 2022 Service Manual page 60

MAINTENANCE SPECIFICATION (ENGINE)
Cylinder head
Warpage limit
Camshaft
Camshaft lobe dimensions
Lobe height limit (Intake)
Lobe height limit (Intake high speed)
Lobe height limit (Exhaust)
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 limit (intake)
Valve seat contact width limit (exhaust)
Valve stem diameter limit (intake)
Valve stem diameter limit (exhaust)
Valve guide inside diameter (intake)
Valve guide inside diameter (exhaust)
Valve-stem-to-valve-guide clearance limit
(intake)
Valve-stem-to-valve-guide clearance limit
(exhaust)
Valve stem runout
Valve spring
Free length limit (intake)
Free length limit (exhaust)
Cylinder
Bore
Wear limit
Piston
Diameter
Measuring point (from piston skirt bottom)
Piston-to-cylinder clearance
Piston pin bore inside diameter limit
Piston pin outside diameter limit
Piston ring
Top ring
End gap limit
Side clearance limit
2nd ring
End gap limit
Side clearance limit
0.05 mm (0.0020 in)
32.268 mm (1.2704 in)
32.332 mm (1.2729 in)
29.516 mm (1.1620 in)
14.015 mm (0.5518 in)
13.935 mm (0.5486 in)
0.10–0.14 mm (0.0039–0.0055 in)
0.21–0.25 mm (0.0083–0.0098 in)
1.3 mm (0.05 in)
1.7 mm (0.07 in)
4.945 mm (0.1947 in)
4.930 mm (0.1941 in)
5.000–5.012 mm (0.1969–0.1973 in)
5.000–5.012 mm (0.1969–0.1973 in)
0.080 mm (0.0032 in)
0.100 mm (0.0039 in)
0.020 mm (0.0008 in)
32.11 mm (1.26 in)
32.11 mm (1.26 in)
58.000–58.010 mm (2.2835–2.2839 in)
58.060 mm (2.2858 in)
57.962–57.985 mm (2.2820–2.2829 in)
6.0 mm (0.24 in)
0.015–0.048 mm (0.0006–0.0019 in)
14.043 mm (0.5529 in)
13.975 mm (0.5502 in)
0.50 mm (0.0197 in)
0.115 mm (0.0045 in)
0.85 mm (0.0335 in)
0.115 mm (0.0045 in)
2-3
SPEC