Do it yourself
Frequently asked questions about cars and motorcycles

How to Replace the Transmission of the Sym Jet 125?

Model: Sym Jet 125
Part: Drivetrain

Video tutorial

To replace the transmission of the Sym Jet 125, loosen the screws securing the transmission cover located on the left side of the scooter near the rear wheel. Once the screws are removed, detach the cover and loosen the central nuts of the clutch and variator.

This will allow you to remove both components and detach the belt. At this point, insert the new components into their housing, ensuring everything functions correctly.


Updated on 15 August 2026 by ScegliAuto


Related tutorials

Jet 125 This video shows where the battery is located on the SYM Jet 125 scooter, useful if you need to replace or simply recharge it. As shown, the battery …
Jet 125 Removing the engine from the Sym Jet 125 involves loosening the screws that secure the engine block to the frame supports: once the mounting screws a…
Jet 125 To dismantle the engine of a Sym Jet 125, loosen all the bolts securing the engine block to its housing at the central lower part of the vehicle. Onc…

How to Change the Engine Oil on a Benelli 302S?

To change the engine oil on a Benelli 302S, loosen the drain plug located at the central lower part of the bike: once removed, collect all the used oil in a suitably positioned container. After all the oil has drained out, you can also remove the corresponding filter, which is located at the front lower part of the vehicle; once the new filter is inserted, top up the oil: the new oil should be added through the breather on the right side of the bike.

Watch the video!


by ScegliAuto

More videos