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Piston/Piston Rings/Piston Pin
Servicing Your Honda 79
Cylinder Removal
1. Remove the cylinder bolt (1) and cylinder (2).
Do not let the cam chain fall into the crankcase.
Do not pry on or strike the cylinder.
NOTICE
(1) cylinder bolt
(2) cylinder
2. Remove the dowel pins (3) and cylinder
gasket (4).
Do not let the dowel pins fall into the crankcase.
NOTICE
(3) dowel pins
(4) cylinder gasket
Piston Removal
1. Place clean shop towels in the crankcase to
keep the piston pin clips or other parts from
falling into the crankcase.
2. Remove the piston pin clips (1) using a pair of
needle-nose pliers.
3. Press the piston pin (2) out of the piston (3),
and remove the piston.
Under racing conditions, the piston and rings
should be replaced every 6 races or about every
15.0 hours of running. Replace the piston pin every
6 races or about every 15.0 hours of running.
Piston Ring Removal
Spread each piston ring (1) and remove by lifting
it up at a point just opposite the gap.
Do not damage the piston ring by spreading the
ends too far.
NOTICE
(1)
(2)
(4)
(3)
(3)
(2)
(1)
(1) piston pin clip (3) piston
(2) piston pin
(1)
(1) piston ring
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