Yamaha YW125Y_ Utility Trailer User Manual


 
2-8
SPEC
Item
Standard
Limit
H
D
ENGINE SPECIFICATIONS
T
B
B
T
Piston
Piston-to-cylinder clearance 0.010 ~ 0.035mm 0.15mm
(0.0004 ~ 0.0014in) (0.0059in)
Diameter D 52.375 ~ 52.390mm
(2.0620 ~ 2.0626in)
Height H 7.0mm (0.28in)
Piston pin bore (in the piston)
Diameter 15.002 ~ 15.013mm 15.043mm
(0.5906 ~ 0.5911in) (0.5922in)
Offset 0.35 ~ 0.65mm
(0.0138 ~ 0.0256in)
Offset direction Intake side
Piston pin
Outside diameter 14.995 ~ 15.000mm 14.975mm
(0.5904 ~ 0.5906in) (0.5896in)
Piston rings
Top ring
Ring type Barrel
Dimensions (B × T) 1.0 × 2.1mm
(0.0394 × 0.0827in)
End gap (installed) 0.10 ~ 0.25mm 0.50mm
(0.0039 ~ 0.0098in) (0.0197in)
Ring side clearance 0.02 ~ 0.08mm 0.13mm
(0.0008 ~ 0.0031in) (0.0051in)
2nd ring
Ring type Taper
Dimensions (B × T) 1.0 × 2.1mm
(0.0394 × 0.0827in)
End gap (installed) 0.25 ~ 0.40mm 0.75mm
(0.0098 ~ 0.0157in) (0.0295in)
Ring side clearance 0.02 ~ 0.06mm 0.12mm
(0.0008 ~ 0.0024in) (0.0047in)
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