8. CYLINDER/PISTON ATV 150/125
SPECIFICATIONS mm (in)
ATV 125 Standard Service Limit
Cylinder I.D. 56.5356.545 56.6 (2.264)
(2.26122.2618)
Warpage 0.05 (0.002)
Cylindricity 0.05 (0.002)
True roundness 0.05 (0.002)
Ring-to-groove Top 0.0150.055 0.09 (0.0036)
(0.0060.0022)
clearance Second 0.0150.055 0.09 (0.0036)
(0.0060.0022)
Top 0.10.25 (0.0040.01) 0.5 (0.02)
Piston, Ring end gap Second 0.10.25 (0.0040.01) 0.5 (0.02)
piston ring Oil side rail 0.20.7 (0.0080.028)
Piston O.D. 56.4656.5 56.4 (2.256)
(2.25842.26)
Piston O.D. measuring position 5 (0.2) from bottom of skirt
. Piston-to-cylinder clearance 0.010.04 (0.0004 0.1 (0.004)
0.0016)
Piston pin hole I.D. 15.00215.008 15.04 (0.6016)
(0.600080.30016)
Piston pin O.D 14.99415 (0.599760.6) 14.96 (0.5984)
Piston-to-piston pin clearance 0.0020.014 0.02 (0.008)
(0.000080.00056)
Connecting rod small end I.D. bore 15.01615.034 15.06 (0.6024)
(0.600640.60136)
8-4