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This guide shows how to change the gear oil on a Piaggio Vespa PX 125. The first step is to remove the right side panel. Place a container under the gearbox to collect the used oil. Using an 11 mm spanner, unscrew the drain plug located at the bottom of the gearbox. Use a flathead screwdriver to unscrew the fill hole cap. Once all the lubricant has drained, close the drain plug and clean up any spilled oil. Using a syringe, insert the new gear oil into the reservoir; approximately 250 ml of fluid is required. Tighten the reservoir screw and clean up any excess oil. Refit the side panel and run the engine for a few minutes to circulate the oil.

Updated on 15 May 2026 by ScegliAuto

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