Vespa Primavera 50 - Service manual > Engine from vehicle

N.B.

THE UNITS OF MEASUREMENT CONTAINED IN THIS CHAPTER ARE EXPRESSED IN TERMS OF THE DECIMAL METRIC SYSTEM. TO REFER TO THE UNIT OF MEASUREMENT EXPRESSED IN TERMS OF THE ANGLO-SAXON SYSTEM, SEE THE "CHARACTERISTICS" CHAPTER.

Exhaust assy. Removal

• Remove the 2 fixing nuts from the manifold to the head

• Remove the Lambda probe from its support and disconnect it.
• Release the lambda probe cable from the bracket on the fan cover.

CAUTION

FREE THE CABLES OF THE OXYGEN SENSOR BEFORE REMOVING THE SILENCER, PUTTING THIS CABLE HARNESS UNDER AN EXCESSIVE VOLTAGE MAY DAMAGE IT.

• Loosen the 2 exhaust fixing screws to the crankcase, then remove the whole exhaust.

• Remove the lambda probe from the manifold.

Removal of the engine from the vehicle

CAUTION

SUPPORT THE MOTORCYCLE FIRMLY.

• Disconnect the battery.
• Remove the footrest.
• Remove the helmet compartment.
• Remove the full silencer unit.
• Free the sheath on the 2 rear brake transmission securing brackets indicated in the photo.
• Disconnect the rear brake transmission by unscrewing the adjuster screw.

• Disconnect the belt cooling pipe indicated in the picture.
• Disconnect the ground lead from the engine.

• Disconnect the air intake pipe from the filter box.

• Remove the ground lead and the positive cable from the starter motor shown in the figure.

• Disconnect the fuel hoses and the main cable harness from the injector.

• Disconnect the main cable harness from the engine temperature sensor.

• Remove the connector from the idle speed adjustment device
• Remove the connectors of the H.V.coil

• Remove the throttle position sensor connector.

• Disconnect the flywheel connector

• Remove the throttle grip cables

• Working on the right side, unscrew and remove the nut which holds the coupling bolt swinging arm
• Working on the left side, remove the bolt, be careful to collect the spacer

• Support the vehicle adequately (with a jack) and remove the shock absorber lower clamping

See also: