1998-2004 Honda Foreman 450 factory service manual, Page 152Get this manual
CYLINDER HEADCYLINDERPISTON I nspect the top of the cylinder fo warpage
SERVICE LIMIT: 0.10 mm (0.004 in)
Do not damage the piston rings during removal
Remove the piston rings
Remove any carbon deposits from the piston ring grooves, using an old piston ring as shown
Temporarily install the piston rings to their proper position with the mark facing upMeasure the piston ring-to-ring groove clearance with the rings pushed nto the grooves