Yamaha E115A, Service Manual

Page: 34 / 261

SPEC
2-11 61U5H11
Item Unit
Model
115BE 115BET 140BET
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) 0.30–0.50 (0.0118–0.0197)
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) 28.070–28.082 (1.1051–1.1056)
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 6E517 6L105
Main jet (M.J.) # 176 180
Main nozzle (M.N.) mm (in) 3.6 (0.14)
Main air jet # 270 240
Pilot jet (P.J.) # 78 82
Pilot air jet (P.A.J.) # 60
Pilot screw (P.S.) turns out 3/8–7/8 5/8–1 1/8
Valve seat size mm (in) 1.2 (0.05)
Float height mm (in) 16 (0.63)
Specification
61U5H11_02_1 06.2.10 5:15 PM Page 12