Piaggio Liberty 50 - Owner's Manual > Spark plug dismantlement

Proceed as follows:

Remove the spark plug cap located on the central cover, then disconnect the plug lead and unscrew the plug with the supplied spark plug wrench. When refitting the plug it should be hand-tightened initially.

Be sure to engage the threads properly by holding it at the correct angle. Use the spark plug wrench only to fully tighten the plug.

Refit the cover following the above steps in the opposite order, taking care to engage the tabs of the spark plug cap in the central cover.

WARNING

THE SPARK PLUG MUST BE REMOVED WHEN THE ENGINE IS COLD. THE USE OF A SPARK PLUG WITH THERMAL GRADE OR THREAD OTHER THAN THE INDICATED TYPE (SEE "DATA" SECTION) CAN SERIOUSLY DAMAGE THE ENGINE.

REPLACE SPARK PLUGS AT THE INTERVALS INDICATED IN THE SCHEDULED MAINTENANCE TABLE.

Characteristic

Recommended spark plug
CHAMPION RG 4 HC
CHAMPION RG 4 PHP

Alternative spark plug
DENSO U24ESR-NB

Removing the air filter

Remove the undersaddle band and then unscrew the seven cross-slotted screws.

Remove cover "A" from its seat. Remove the filter element, wash it in water and shampoo and then wipe it with a clean cloth and dry it with short compressed air jets.

Immerse the filter element in a 50-percent mixture of petrol and oil. Squeeze the filter element between the hands without wringing, allow it to dry and then refit it.

CAUTION

IN CASE OF RIDING ON DUSTY ROADS IT IS ADVISABLE TO CLEAN THE AIR FILTER MORE FREQUENTLY THAN INDICATED IN THE RELEVANT CHAPTER ON SCHEDULED MAINTENANCE.

Recommended products

AGIP FILTER OIL

Special product for the treatment of foam filters.

Secondary air system

Remove the three screws "A" on the cover of the secondary air system housing.

Detach the housing cover and remove the filter and the sponge "B". wash the sponge with water and a neutral soap, dry with a clean cloth and short blasts of compressed air. While cleaning the filter, check the good condition of the reed valve C and mount it back in place on the housing.

Before closing the cover of the SAS housing, check the good condition of the sealing O-ring; replace it if damaged or deformed.

N.B.

The reed valve can be inserted in only one direction on the SAS housing

CAUTION

CONTACT AN AUTHORISED PIAGGIO SERVICE CENTRE TO CARRY OUT THESE OPERATIONS.

Intake plug

Remove the cap of the transmission cover operating on the corresponding release slots with a plain slot screwdriver. Wash the sponge in water and soap without removing it from its seat. Dry it with compressed air before refitting it taking care to do so at the correct angle.

CAUTION

WARNING. SHOULD THERE BE PROBLEMS DURING THE IDLE SPEED ADJUSTMENT OPERATION, IT MAY BE NECESSARY TO ADJUST THE LEVEL OF EXHAUST EMISSIONS (CO). TURN TO AN AUTHORISED PIAGGIO SERVICE CENTRE TO CARRY OUT THESE OPERATIONS.

See also: