2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 229Get this manual
CYLINDERPISTON
SERVICE INFORMATION
GENERAL
The cylinder and piston can be serviced with the engine installed in the frame
Take care not to damage the cylinder wall and piston Be careful notto damage the mating surfaces when removing the cylinder Rocker arm and valve lubricating oil is fed through the oil passage in the cylinderClean the oil passage before installing the cylinder When disassembling, mark and store the disassembled parts to ensure that they are reinstalled in their originallocations
SPECIFICATIONS
Cylinder
STANDARD
1.0, Out "of-round
102.015 (4.0157 4.0163)
Unit' mm (in} SERVICE UMIT 102.05 (4.018) 0.05 (0,002)
Taper Warpage
Piston, piston pin, piston ring Piston 0.0at 20 (O,al from bottom Piston pin hole 1.0Piston pin 0.0Piston-to-piston pin clearance Piston ring end Top
0.05(0.002)