KYMCO Dink 50, Service Manual

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7
. CYLINDER/PISTON
7-15
DINK 50/125
Measure the piston O.D.
Service Limit : 38.9mm replace if below
Measure the piston-to-piston pin clearance.
Service Limit : 0.02mm replace if over
CYLINDER INSPECTION
Inspect the cylinder bore for wear or damage.
Measure the cylinder I.D. at three levels of
top, middle and bottom at 90
°
to the piston
pin (in both X and Y directions).
Cylinder I.D.:
Service Limit : 39.1mm replace if over
Measure the cylinder-to-piston clearance.
Service Limit : 0.1mm repair or replace if
over
The true roundness is the difference between
the values measured in X and Y directions.
The cylindricity (difference between the
values measured at the three levels) is subject
to the maximum value calculated.
Service Limits :
True Roundness : 0.05mm repair or replace
if over
Cylindricity : 0.05mm repair or replace if over
＊
Take measurement at 4.5mm from the
bottom and 90
°
to the piston pin hole.
4.5mm