1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 83Get this manual
7CYLINDERPISTON SERVICE INFORMATION TROUBLESHOOTING CYLINOER REMOVAL PISTON REMOVAL PISTON INSTALLATION CYLINOER INSTALLATION
SERVICE INFORMATION
GENERAL
Camshaft lubrication oil is fed to the cylinder head through an orifice in the cylinder head and crankcaseBe sure that this orifice is not clogged and that the a-rings and dowel pins are in place before installing the cylinder head
SPECI FIC ATI ONS
Cylindtlr
STANDARD
SERVICE LIMIT 55.10 mm (2.1 69 in) 0.05 mm (0.002 in)
1.0Tape r
Out of round
55.000-55 .010 mm (2.1654 2.1657 in)
0.05 rnm (0.002 in)
0.10 mm (0.004 in)
Piston, piston pin, piston rings
Warpage across top Piston .0Piston pin bore
pin 0.0Pistontopin clearance Piston ring-to-ring TOP groove clearance SECOND
54.955 54.985 mm (21636 2.1648 in)
54.90mm{2.161 in}
Piston ring end gap