Honda 2010 CBF 250, Workshop Manual

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PISTON/CYLINDER
8-4
Use a rule of precision and a gauge of thicknesses to verify the
upper part of the cylinder with regard to twist.
Service Limit 0,05 mm
RINGS
PISTON
Remove the deposits of carbon piston.
NOTE
Use a ring already ruled out to clean up the deposits of
carbon of the slots in the rings of the piston
(according to the illustration). Never use a brush with
steel, because it hurt the slots in the rings.
RING
DISMANTLING THE PISTON
NOTE
Remove the clips of cotter pin, using a pliers. Remove the cotter pin
from the piston. Remove the piston of the crank. Inspect the
movement of the rings of the piston, making twist
while the press. The rings should move freely in the
slots, without becoming bogged down. Open each ring
of the piston and remove, tilting upwards, from the point
opposite to the opening of their limbs.
i
•Do not open too the extremities of the rings of the
piston, not to harm them. •Be careful not to
damage the piston to remove the rings.
Before the dismantling, place a clean cloth around the
crank to prevent the clips of cotter pin fall within the casing
of the engine.
COTTER PIN/BRA OF COTTER PIN
PISTON
CBX250