KYMCO Mongoose/KXR 250

8. CYLINDER/PISTON
8-3
Mongoose/KXR 250
SPECIFICATIONS
Standard
(
mm
)
Service Limit
(
mm
)
I.D. 72.705～72.715 72.8
Warpage ⎯ 0.05
Cylindricity ⎯ 0.05
True roundness ⎯ 0.05
Rin
g
-to-
g
roove
Top 0.015～0.055 0.09
clearance
Second 0.015～0.055 0.09
Top 0.15～0.3 0.5
Piston,
Ring end gap Second 0.3～0.45 0.65
piston rin
g
Oil ring 0.2～0.7 0.9
Piston O.D. 72.67～72.69 72.6
Piston O.D. measuring position 10mm from bottom of skirt ⎯
. Piston-to-cylinder clearance 0.010～0.040 0.1
Piston pin hole I.D. 17.002～17.008 17.04
Piston pin O.D 16.994～17.000 16.96
Piston-to-piston pin clearance 0.002～0.014 0.02
Connecting rod small end I.D. bore 17.016～17.034 17.06
Cylinde
r