Vespa PX 150
Vespa PX 150

Engine Tuning

Disconnect the engine from the scooter by separating the electrical wiring by hand and cutting the control cables with a cable snipper. Use a socket wrench and crescent wrench to release the engine bolt, the rear suspension bolt, and the rear wheel and hub. Use a socket wrench and screwdriver to remove the carburetor and old exhaust. Pick up the freed engine and place it on a workbench. Use a screwdriver, crescent wrench and socket wrench to disassemble then engine down to the bare engine cases.

Place all the parts in a bin for safekeeping.

Wash the engine cases clean. Pop out the old bearings and seals. Install new bearings and oil seals with an appropriate size socket and hammer (freeze the bearings first for easier installation). Reinstall all the removed engine parts back together using a socket wrench, crescent wrenches and screwdrivers.

Apply new engine gaskets when closing up the engine cases. Slide the new performance cylinder onto the engine after placing the cylinder gasket in position. Tighten down to factory specifications with a socket wrench.

Reinstall the engine into the scooter, connect the swingarm bolt and rear suspension bolt. Reconnect the rear wheel and hub. Reconnect the electrical and control cables using new cables.

Use a socket wrench to install a new spark plug and connect the ignition cap to it.

Tips Warnings


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Vespa PX 150
Vespa PX 150
Vespa PX 150
Vespa PX 150
Vespa PX 150

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