Yamaha E115A, Service Manual

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Item Unit
Model
E115AMH E115AWH E115AE E115AET
Piston ring
Top ring
Dimension B mm (in) 1.970–1.990 (0.0776–0.0783)
Dimension T mm (in) 2.700–2.900 (0.1063–0.1142)
End gap mm (in) 0.30–0.40 (0.0118–0.0157)
Side clearance mm (in) 0.02–0.06 (0.0008–0.0024)
Oversize outside diameter
1st mm (in) 90.25 (3.5531)
2nd mm (in) 90.50 (3.5630)
2nd piston ring
Dimension B mm (in) 1.970–1.990 (0.0776–0.0783)
Dimension T mm (in) 2.700–2.900 (0.1063–0.1142)
End gap mm (in) 0.30–0.40 (0.0118–0.0157)
Side clearance mm (in) 0.02–0.06 (0.0008–0.0024)
Oversize outside diameter
1st mm (in) 90.25 (3.5531)
2nd mm (in) 90.50 (3.5630)
Connecting rod
Small-end inside diameter mm (in) 26.500–26.512 (1.0433–1.0438)
Connecting rod big-end mm (in) 0.120–0.260 (0.0047–0.0102)
side clearance
Small-end axial play limit
mm (in) 2.0 (0.08)
Crankshaft
Crankshaft journal diameter mm (in) 53.975–53.991 (2.1250–2.1256)
Crankpin diameter mm (in) 35.985–36.000 (1.4167–1.4173)
Runout limit mm (in) 0.02 (0.0008)
Thermostat
Opening temperature °C (°F) 48–52 (118.40–125.60)
Fully open temperature °C (°F) 60 (140)
Valve open lower limit mm (in) 3.0 (0.12)
Reed valve
Valve stopper height mm (in) 6.2–6.8 (0.24–0.26)
Valve bending limit mm (in) 0.2 (0.0079)
Carburetor
ID mark 61UM2 61U03 61U03/61U10
Main jet (M.J.) # 174
Main nozzle (M.N.) mm (in) 3.6 (0.14)
Main air jet # 270
Pilot jet (P.J.) # 78
Pilot air jet (P.A.J.) # 60
Pilot screw (P.S.) turns out 1–1 1/2
Valve seat size mm (in) 1.2 (0.05)
Float height mm (in) 16 (0.63)
61U5H11 2-6
Maintenance specification
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