1998-2004 Honda Foreman 450 factory service manual, Page 154Get this manual
CYLINDER HEADCYLINDERPISTON Push the rings into the cylinder with the top of the piston to be sure they are squarely in the cylinder
Insert the piston ring squarely into the bottom of the cylinder and measure the ring end gap
SERVICE LJMITS: Top: 0.5 mm (0.02 in) Second: 0.6 mm (0.02 in)
PISTON RING INSTALLATION
Clean the piston ring grooves thoroughly and install the piston rings NOTE:
After '01
Apply oi to the piston rings Avoid piston and piston ring damage during insta llation Install the piston rings with their markings facing upDo not ix the top and second rings; the top ring is narrower than the second ring in width Space the piston ring end gaps 120 degrees apartDo not align the gaps in the oil rings (side rails)After installation, the rings should rotate freely in the ring groovesIN