Honda CRF250R 2018 Owner's Manual page 87

Piston/Piston Rings/Piston Pin
Piston Removal
1. Place a clean shop towel (1) in the crankcase to
keep the piston pin clips, or other parts, from
falling into the crankcase.
2. Remove the piston pin clips (2) using a pair of
needle-nose pliers.
3. Press the piston pin (3) out of the piston (4),
and remove the piston.
Under racing conditions, the piston, rings and
piston pin should be replaced every 6 races or
about every 15.0 hours of running.
NOTICE
Be careful not to damage or give a shock to the
piston pin.
Do not clean the piston pin using a commercially
available compound cleaner.
(2)
(1)
(1) shop towel (3) piston pin
(2) piston pin clips (4) piston
82
Servicing Your Honda
Piston Ring Removal
Spread each piston ring (1) and remove by lifting it
up at a point just opposite the gap.
NOTICE
Do not damage the piston ring by spreading the
ends too far.
(4)
(1) piston ring
(3)
Piston/Piston Pin/Piston Ring Inspection
We recommend you consult an official Honda
Service Manual or your dealer for correct Service
Limit measurements.
(1)