CF MOTO CF500-5B 2009, Service Manual, Page: 15 / 272

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1 . M a i n t e n a n ce I n f o r m a ti on
1
C y l i n d e r + P i s t o n + P i s t on R i ng + C r a n k s h a ft
(mm)
Item Standard
Operation
Limit
Remark
Cylinder Pressure 1000kPa
Fit Clearance between
P iston and Cylinder
0.030-0.051 0.15
Piston Skirt dia.
87.460-87.480
Testing the point away skirt end
10mm
87.380
Internal dia. of Cylinder 87.500-87.522
Plainness of Cylinder
Adjoining Plant
0.015 0.05
Top Ring R 11.7 round 8.9
Piston Ring Free Gap
2
nd
Ring R 12 round 9.5
Top Ring 0.15-0.30 0.60
Piston Ring Closed Gap
2
nd
Ring 0.15-0.30 0.60
Top Ring 0.04-0.08 0.180 Piston Annular Fit
Clearance
2
nd
Ring
0.03-0.07
0.150
Top Ring
0.97-0.99
Thickness Piston Ring
2
nd
Ring
1.17-1.19
Top Ring 1.03-1.05
2
nd
Ring
1.22-1.24
Piston Annular Width
Oil Ring 2.51-2.53
Internal dia. of Piston Pin
Bore
23.002-23.008
23.030
Exterior dia. Piston Pin 22.995-23.000
22.980
Rod Small End Inner dia. 23.006-23.014
23.040
Rod Big End Gap 0.10-0.55
1.0
Rod Big End Thickness 24.95-25.00
Crankshaft Run-out 0.03
0.08