Yamaha MBK X-MAX 300 2017, Service Manual

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ENGINE SPECIFICATIONS
2-4
Valve-stem-to-valve-guide clearance
(exhaust) 0.025–0.052 mm (0.0010–0.0020 in)
Limit 0.100 mm (0.0039 in)
Valve stem runout 0.010 mm (0.0004 in)
Valve spring
Free length (intake) 35.87 mm (1.41 in)
Limit 34.07 mm (1.34 in)
Free length (exhaust) 35.87 mm (1.41 in)
Limit 34.07 mm (1.34 in)
Cylinder
Bore 70.000–70.025 mm (2.7559–2.7569 in)
Wear limit 70.075 mm (2.7589 in)
Piston
Diameter 69.962–69.985 mm (2.7544–2.7553 in)
Measuring point (from piston skirt bottom) 8.0 mm (0.31 in)
Piston-to-cylinder clearance 0.031–0.047 mm (0.0012–0.0019 in)
Piston pin bore inside diameter 16.002–16.013 mm (0.6300–0.6304 in)
Limit 16.043 mm (0.6316 in)
Piston pin outside diameter 15.995–16.000 mm (0.6297–0.6299 in)
Limit 15.975 mm (0.6289 in)
Piston-pin-to-piston-pin-bore clearance 0.002–0.018 mm (0.0001–0.0007 in)
Piston ring
Top ring
Ring type Barrel
End gap limit 0.50 mm (0.0197 in)
Ring side clearance 0.030–0.065 mm (0.0012–0.0026 in)
Side clearance limit 0.115 mm (0.0045 in)
2nd ring
Ring type Taper
End gap limit 1.15 mm (0.0453 in)
Ring side clearance 0.020–0.055 mm (0.0008–0.0022 in)
Side clearance limit 0.115 mm (0.0045 in)
Connecting rod
Oil clearance 0.033–0.057 mm (0.0013–0.0022 in)
Code 1 Blue
Code 2 Black
Code 3 Brown
Code 4 Green
Crankshaft
Runout limit 0.030 mm (0.0012 in)
Crankshaft journal diameter 39.976–40.000 mm (1.5739–1.5748 in)
Crankshaft journal bearing inside diameter 40.015–40.056 mm (1.5754–1.5770 in)
Journal oil clearance 0.031–0.064 mm (0.0012–0.0025 in)
Code 0 White
Code 1 Blue
Code 2 Black
Code 3 Brown