1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 87Get this manual
CYLINOER PI STON PISTON RING INSTALLATION Clean the piston ring grooves thoroughly and install the piston rings with the marks facing up,
Avoid piston and piston ring damage during instaUationDo not mix the lop and second ringsSpace the piston ring end gaps 120 degrees apart Do not align the gaps in the oit rings (side rails) ,
TOP RING
After installation, the rings should be free to rotate in the ring grooves