APRILIA Atlantic 300 Service Station Manual page 130

Engine
S = left
D = right
- Set the snap ring into its position with the punch.
- Fit the pin stop ring using the plug as shown in
the figure.
NOTE
THE TOOL FOR INSTALLING THE RETAINER RINGS MUST
BE USED MANUALLY.
CAUTION
USING A HAMMER MAY DAMAGE THE RINGS HOUSINGS.
Specific tooling
AP8140920 Tool for pin rings
Choosing the gasket
- First fit the piston into the cylinder, without any base gasket.
- Fit a dial gauge on the specific tool.
Specific tooling
020428Y Piston position check mounting
- With a contrasting surface, reset the dial gauge
with a preloading of a few millimetres.
- Finally fix the dial gauge.
- Check the perfect sliding of the feeler pin.
- Fit the tool on the cylinder without changing the
dial gauge position.
- Lock the tool with the original head fixing nuts.
- Rotate the crankshaft up to TDC (the reversal
point of the dial gauge rotation).
- Measure the deviation from the reset value.
- By means of the table (see the Specifications chapter) identify the cylinder base gasket thickness to
be used upon refitting. By correctly identifying the cylinder base gasket thickness, an adequate com-
pression ratio can be maintained
- Remove the specific tool and the cylinder.
NOTE
IF DEVIATIONS (PROTRUSIONS OR RECESSES) CLOSE TO THE CHANGE OF CATEGORY ARE
MEASURED, REPEAT THE MEASUREMENT AT THE OPPOSITE SIDE. TO DO SO, REPEAT THE
TOOL FITTING OPERATION, INVERTING ITS POSITION.
See also
ENG - 130
ATLANTIC 300 i.e.