Honda CRF450X 2007 Owner's Manual page 83

Piston/Piston Rings/Piston Pin
Piston/Piston Pin/Piston Ring Inspection
We recommend you consult the Service Manual
or your authorized Honda dealer for correct
Service Limit measurements.
78
Servicing Your Honda
Piston Ring Installation
1. Clean the piston ring groove throughly.
2. Apply engine oil to the piston rings and install
them.
NOTICE
Do not damage the piston ring by spreading the
ends too far.
Do not damage the piston during piston ring
installation.
• To install the oil ring, install the spacer first,
then install the side rails.
• Install the top ring on the piston with the
marking side facing up.
3. After installing the rings they should rotate
freely, without sticking.
Space the ring end gaps 180 degrees apart
between top ring and upper side rail.
Space the ring end gaps 90 degrees apart
between upper side rail, spacer and lower side
rail.
mark
top ring
side
rail
spacer
side rail
top ring
oil ring
oil
ring