KYMCO Downtown 350i, Repair Manual

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1.Quick Reference
Downtown 350i
1-11
Item Standard (mm)
Cylinder
I.D. 75.3
Taper limit 0.05
Out of round limit 0.05
Piston,
piston ring
Ring-to-groove clearance
Top 0.015 - 0.055
Second 0.015 - 0.055
Ring end gap
Top 0.10 - 0.25
Second 0.10 - 0.25
Oil side rail 0.2 - 0.7
Piston O.D.
Piston O.D. measuring point 9 mm from bottom of skirt
Piston-to-cylinder clearance 0.101 - 0.040
Piston pin hole I.D. 15.002 - 15.008
Piston pin O.D. 14.994 - 15.000
Piston-to-piston pin clearance 0.002 - 0.014
Connecting rod small end I.D. Bore 15.016 - 15.034
Item Standard (mm) Service Limit (mm)
Crankshaft
Connecting rod big
end side clearance
0.15 - 0.35 0.6
Connecting rod big
end radial clearance
0 - 0.008 0.05
Bearing Color
Crankcase mark
Crankshaft mark A B C D
A black green green red
B green green red ---
Item Service Limit (mm)
Starter drive gear I.D. 22.15
Starter drive gear O.D. 41.50