Yamaha MT-09 2021 Service Manual page 30

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 limit (Intake)
Lobe height limit (Exhaust)
Camshaft runout 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
ENGINE SPECIFICATIONS
NGK/LMAR9A-9
0.8–0.9 mm (0.031–0.035 in)
0.10 mm (0.0039 in)
24.500–24.521 mm (0.9646–0.9654 in)
24.459–24.472 mm (0.9630–0.9635 in)
0.080 mm (0.0032 in)
35.590 mm (1.4012 in)
35.620 mm (1.4024 in)
0.030 mm (0.0012 in)
0.11–0.20 mm (0.0043–0.0079 in)
0.28–0.32 mm (0.0110–0.0126 in)
1.6 mm (0.06 in)
1.8 mm (0.07 in)
4.445 mm (0.1750 in)
4.430 mm (0.1744 in)
4.500–4.512 mm (0.1772–0.1776 in)
4.500–4.512 mm (0.1772–0.1776 in)
0.080 mm (0.0032 in)
0.100 mm (0.0039 in)
0.020 mm (0.0008 in)
37.34 mm (1.47 in)
35.89 mm (1.41 in)
78.000–78.010 mm (3.0709–3.0713 in)
78.060 mm (3.0732 in)
77.975–77.990 mm (3.0699–3.0705 in)
9.0 mm (0.35 in)
0.010–0.035 mm (0.0004–0.0014 in)
17.043 mm (0.6710 in)
16.970 mm (0.6681 in)
2-3