Checking The Spark Advance - APRILIA RS4 50 2011 Workshop Manual

RS4 50 MY2011
The engine idle speed should be of about 1600 ±
100 rpm;
If necessary:
•
Rest the vehicle on its stand.
•
Insert a Phillips screwdriver in the slot
and actuate on the set screw placed in
the carburettor.
TURN IT CLOCKWISE to increase revs. TURN IT
ANTICLOCKWISE to reduce revs.
•
Accelerate and decelerate some times
with the throttle grip to check its correct
functioning and that the idle speed is
stable.
NOTE
TAKE THE VEHICLE TO AN official aprilia Dealer IF RE-
QUIRED.
Carburettor
- Disassemble the carburettor in its parts, wash all of them with solvent, dry all body grooves with
compressed air to ensure adequate cleaning.
- Check carefully that the parts are in good conditions.
- The throttle valve should slide freely inside the mix chamber; replace valve in case of excessive
clearance due to wear.
- If there are wear marks in the mix chamber causing inadequate tightness or valve slide (even if it is
new), replace the carburettor.
- It is advisable to replace the gasket at each refit
WARNING
PETROL IS HIGHLY EXPLOSIVE ALWAYS REPLACE THE GASKETS TO AVOID PETROL LEAKS

Checking the spark advance

Engine timing control
- Remove the crankcase left cover.
- Connect the adequate specific tool, with the red
clamp to the positive (+) battery lead and the black
clamp to the negative (-) battery lead. Connect the
synchroniser to the high voltage conductor (the
wire connecting the high voltage coil and the spark
plug).
Maintenance
MAIN - 49