Yamaha E115A, Service Manual

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Maintenance specification
Power unit (115B, 140B models)
(*1) Measuring conditions:
Ambient temperature 20°C (68°F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
Item Unit
Model
115BE 115BET 140BET
Power unit
Minimum compression kPa 450 (4.5, 64)
pressure (*1) (kgf/cm 2 , psi)
Cylinder head
Warpage limit mm (in) 0.10 (0.0039)
(lines indicate straightedge
position)
Cylinder
Bore size mm (in) 90.000–90.020 (3.5433–3.5441)
Piston
Piston diameter (D) mm (in) 89.920–89.935 (3.5402–3.5407)
Measuring point (H) mm (in) 10.0 (0.39)
Piston clearance mm (in) 0.080–0.085 (0.0032–0.0033)
Piston pin boss bore mm (in) 23.074–23.085 (0.9084–0.9089)
Oversize piston
1st mm (in) 0.25 (0.010)
2nd mm (in) 0.50 (0.020)
Oversize piston diameter
1st mm (in) 90.170–90.185 (3.5500–3.5506)
2nd mm (in) 90.420–90.435 (3.5598–3.5604)
Piston pin
Piston pin diameter mm (in) 23.065–23.070 (0.9081–0.9083)
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