Removing The Cylinder; Removing The Piston; Checking The Cylinder - APRILIA QUASAR 125 2003 Workshop Manual

ENGINE
1
4
1
2 3
3
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3.2.22 REMOVING THE CYLINDER

"
Remove the head, see 3.2.13 (REMOVING THE HEAD).
"
Remove seal (1).
"
Remove upper sliding shoe (2).
"
Remove cylinder (3).
"
Remove seal (4).
2
3

3.2.23 REMOVING THE PISTON

"
Remove the cylinder, see 3.2.22 (REMOVING THE CYLINDER).
Before removing gudgeon pin circlips, block off casing opening with a
clean cloth to prevent them from falling into the engine.
"
Remove gudgeon pin (2) circlip (1).
"
Remove gudgeon pin (2).
"
Remove piston (3).

3.2.24 CHECKING THE CYLINDER

Check that cylinder inner walls are not seized or excessively worn. Measure
cylinder inner diameter using a bore gauge.
Wear limit 0.10 mm (0.004 in) beyond cylinder nominal size (see Coupling
table).
Measure the diameter at three different positions along the cylinder height
and, at each position, take the reading along the circumference.
QUASAR 125-180
Release 00/2003 - 09