KYMCO MXU 300 - SPECIFICATIONS

8. CYLINDER/PISTON
8-3
MXU 300/250
SPECIFICATIONS Unit: mm (in)
Ite
m
Standar
d
Service Limit
I.D.
72.705～72.715
(2.9082～2.9086)
72.8 (2.912)
Warpage ⎯ 0.05 (0.002)
Cylindricity ⎯ 0.05 (0.002)
True roundness ⎯ 0.05 (0.002)
Ring-to-groove
Top
0.015～0.055
(0.0006～0.0022)
0.09 (0.0036)
clearance
Second
0.015～0.055
(0.0006～0.0022)
0.09 (0.0036)
Top 0.15～0.3 (0.006～0.012) 0.5 (0.02)
Piston,
Ring end gap Second 0.3～0.45 (0.012～0.018) 0.65 (0.026)
Piston rin
g
Oil ring 0.2～0.7 (0.008～0.028) 0.9 (0.036)
Piston O.D.
72.67～72.69
(2.9068～2.9076)
72.6 (2.904)
Piston O.D. measuring position 10mm from bottom of skirt ⎯
.
Piston-to-cylinder clearance
0.01～0.04
(0.0004～0.0016)
0.1 (0.004)
Piston pin hole I.D.
17.002～17.008
(0.68008～0.68032)
17.04 (0.6816)
Piston pin O.D
16.994～17
(0.67976～0.68)
16.96 (0.6784)
Piston-to-piston pin clearance
0.002～0.014
(0.00008～0.00056
0.02 (0.0008)
Connecting rod small end I.D. bore
17.016～17.034
(0.68064～0.68136)
17.06 (0.6824)
Cylinde
r