2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 121Get this manual
CYLINDERPISTON
SERVICE INFORMATION
GENERAL
The cylinder and piston service can be done with the engine installed in the frame Camshaft lubrication il is fed to the cylinder head through an orifice in the cylinder head, cylinder and crankcaseBe sure that this orifice is not clogged and that the O-rings and dowel pins are in place before installing the cylinder Be careful not to damage the mating surface by using screwdriver when disassembli ng the cylinder
SPECIFICATIONS
1.0Out-of-round Taper Warpage Piston, Piston .0at 10 (0.4) from bottom piston pin, Piston pin hole 1.0piston ring Piston pin .0 Piston-to-piston pin clearance Piston ring end Top gap Second Oil (side rail) Piston ring-to-ring Top groove clearance Second Cylinder-fa -piston clearance Connecting rod small end 1.0Connecting rod -to-piston pin clearance
Cylinder
STANDARD 47.00547.015 (1.85061.8510)