Piston Removal - Polaris Sportsman 400 Service Manual

PISTON REMOVAL

1. Remove circlip. Note piston directional arrow pointing
toward the right (Mag) side of engine.
2. Remove piston circlip and push piston pin out of piston.
If necessary, heat the crown of the piston slightly with a
propane torch. CAUTION: Do not apply heat to the
piston rings. The ring may lose radial tension.
3. Remove top compression ring.
*Using a piston ring pliers: Carefully expand ring and lift
it off the piston. CAUTION: Do not expand the ring more
than the amount necessary to remove it from the piston, or
the ring may break.
*By hand: Placing both thumbs as shown, spread the ring
open and push up on the opposite side. Do not scratch the
ring lands.
4. Repeat procedure for second ring.
The oil control ring is a three piece design consisting of a
top and bottom steel rail and a center expander section.
The top rail has a locating tab on the end which fits into a
notch (A) in the upper oil ring land of the piston.
5. Remove the top rail first followed by the bottom rail.
6. Remove the expander.
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ENGINE
A
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