Yamaha 55DEHD Service Manual page 36

SPEC
Item
Piston ring
Top ring
Dimension B
Dimension T
End gap (reference data)
Side clearance
Oversize outside diameter
1st
2nd
2nd piston ring
Dimension B
Dimension T
End gap (reference data)
Side clearance
Oversize outside diameter
1st
2nd
Connecting rod
Small-end inside diameter
Big-end inside diameter
Connecting rod big-end
side clearance
Small-end axial play limit
Crankshaft
Crankshaft journal diameter
Crankpin diameter
Runout limit
Thermostat
Opening temperature
Fully open temperature
Valve open lower limit
Reed valve
Valve stopper height
Valve bend limit
Carburetor
ID mark
Main jet (M.J.)
Main nozzle (M.N.)
Main air jet
Pilot jet (P.J.)
Pilot air jet (P.A.J.)
Pilot screw (P.S.)
Valve seat size
Float height
2-11
Specification
Unit
T
mm (in)
B
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
T
mm (in)
B
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
°C (°F)
°C (°F)
mm (in)
mm (in)
mm (in)
mm (in)
turns out
mm (in)
85AEHD
1.965–1.980 (0.0774–0.0780)
3.100–3.300 (0.1220–0.1299)
0.40–0.60 (0.0157–0.0236)
0.05–0.08 (0.0020–0.0032)
1.965–1.980 (0.0774–0.0780)
3.100–3.300 (0.1220–0.1299)
0.40–0.60 (0.0157–0.0236)
0.03–0.06 (0.0012–0.0024)
24.900–24.912 (0.9803–0.9808)
39.010–39.025 (1.5358–1.5364)
0.120–0.260 (0.0047–0.0102)
34.968–34.984 (1.3767–1.3773)
29.985–30.000 (1.1805–1.1811)
#
#
#
#
ø
Model
85AED
82.25 (3.24)
82.50 (3.25)
82.25 (3.24)
82.50 (3.25)
2.0 (0.08)
0.02 (0.0008)
48–52 (118.4–125.6)
60 (140)
3.0 (0.12)
9.7–10.1
(0.38–0.40)
0.2 (0.0079)
68808
165
3.4 (0.13)
180
78
100
7/8–1 3/8
1.6
16.5-22.5 (0.65–0.89)
85AET
6885J11