Vespa GTS Super 300 ie - Service manual > Engine from Vehicle

Exhaust assy. Removal

• Remove the right and left fairings and the spoiler terminals.
• Remove the Lambda probe from its support and disconnect it.

Remove the clamp holding the lambda probe cable to the coolant pipe indicated in the photograph

• Undo the two exhaust manifold fixings on the head. To unscrew the nuts that fix the silencer flange to the head properly, use a jointed wrench that allows, according to the travel direction, to get also at the right nut. That is difficult to do with a traditional straight wrench.

• Undo the three screws that fix the silencer to the supporting arm.
• Remove the full silencer unit.

• Remove the lambda probe from the manifold.

CAUTION: SHOULD IT BE NECESSARY TO REMOVE ONLY THE SILENCER TIP, ALWAYS REPLACE THE GRAPHITE GASKET BETWEEN STUB AND TIP.

Removal of the engine from the vehicle

CAUTION

SUPPORT THE VEHICLE ADEQUATELY.

• Disconnect the battery.
• Remove the helmet compartment.
• Remove the side fairings and the spoiler terminals.
• Remove the rear brake calliper
• Remove the air cleaner from the housing by unscrewing the three screws indicated in the photograph.

CAUTION

THIS OPERATION MUST BE CARRIED OUT WHEN THE ENGINE IS COLD.

• Remove the clamp from the blow-by pipe and take the pipe out; remove the retainer clamp.
• Remove the clamp indicated in the photograph and disconnect the sleeve connecting it to the throttle body.

• Get a + 2.5 l container to collect the coolant.

 

• Remove the coolant inlet pipe to the motor as indicated in the photograph.

• Disconnect the fuel pipe from the injector and remove the screw locking the retainer clamp.
• Disconnect the injector wiring and the throttle body control unit wiring.

• Disconnect the cable harnesses from the two clamps indicated.

• Remove the coolant outlet pipe from the engine as indicated.

• Remove the spark plug cap.
• Remove the coolant temperature sensor connector indicated in the photo.

• Remove the throttle control cables from the throttle body by undoing the nuts indicated in the photograph.

• Loosen the clamp indicated in the photograph and remove the throttle body.

• Remove the clamp retaining the starter motor from the sleeve.

• Remove the positive and negative wiring from the starter motor as shown in the picture.

• Disconnect the connectors from the flywheel wiring as shown in the photo.
• Release the cables from the retainer clamps.

• Remove the four retainers of the rear brake pipes from the crankcase.
• Remove the rear shock absorbers.

• Remove the engine-swinging arm fixing pin by undoing the nut and operating on the head of the pin as shown in the photograph.
• The engine is now free.

Upon refitting the engine to the vehicle, carry out the removal operations but in reverse order, and respect the tightening torque shown in the "Specifications " Chapter.

• Check that there is a small clearance when the valve is in abutment against the set screw.
• Check the engine oil level and if necessary, top it up with the recommended type.
• Fill and bleed the cooling circuit.
• Check accelerator and electric devices for correct functioning.

• Pay particular attention to the sleeve, be careful to position the throttle body reference marks as indicated in the picture.

CAUTION

PAY PARTICULAR ATTENTION TO POSITIONING THE THROTTLE CONTROL TRANSMISSION PROPERLY.

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