Honda CRF450X 2017 Owner's Manual & Competition Handbook page 84

Piston/Piston Pin/Piston Ring Inspection
We recommend you consult the Service
Manual or your dealer for correct Service Limit
measurements.
17 CRF450X̲31MEY710.indb 79 17 CRF450X̲31MEY710.indb 79
Piston Ring Installation
1. Remove the carbon deposits from the piston
head and piston ring grooves with the
removed ring (1).
(1) removed ring
2. Apply engine oil to each piston ring whole
surface and install them to the piston.
NOTICE
Do not damage the piston ring by spreading the
ends too far.
Do not damage the piston during piston ring
installation.
Piston/Piston Rings/Piston Pin
• 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.
(1)
mark
Servicing Your Honda
top ring
oil ring
top ring
side rail
oil
spacer
ring
side rail
piston
79
2016/06/08 11:45:59 2016/06/08 11:45:59