Removing The Driven Pulley; Inspecting The Clutch Drum - APRILIA Atlantic 300 Service Station Manual

ATLANTIC 300 i.e.

Removing the driven pulley

- Remove the clutch bell and the entire driven pul-
ley assembly.
NOTE
THE ASSEMBLY CAN ALSO BE REMOVED EVEN IF THE
DRIVING PULLEY IS MOUNTED.

Inspecting the clutch drum

- Make sure that the clutch bell is not worn or dam-
aged.
- Measure the clutch bell inside diameter.
Characteristic
Max clutch bell value (300 cm³)
Ø 134.5 mm
Clutch bell standard value
Ø 134 ÷ 134.2 mm
Checking the bell working surface eccentricity
- Fit the bell on a driven pulley shaft with 2 bearings
(inside diameter: 15 and 17 mm).
- Lock with the original spacer and nut.
- Place the bell/shaft assembly on the support to
check the crankshaft alignment.
- Using a feeler pin gauge and the magnetic base,
measure the bell eccentricity.
- Repeat the measurement at 3 positions (Central,
internal, external).
- In case of anomalies, replace the bell.
Characteristic
clutch bell check: Limit eccentricity.
Admissible limit eccentricity: 0.15 mm
Specific tooling
Engine
ENG - 101