Do it yourself
Frequently asked questions about cars and motorcycles

Model: Ktm Duke 390

In this video tutorial, see how to disassemble and replace the sprocket on a KTM Duke 390 motorcycle, as well as on the 125 and 250 models. First, position the bike on a stand and start by removing the protective cover of the sprocket by unscrewing the securing screws; once removed, you can loosen your chain by unscrewing the rear adjustment screw, as shown in the video. At this point, unscrew the central nut of the sprocket and remove the circlip; extract it and replace it with the new one of the correct type and with the same tooth count: apply the reverse procedure for reassembly!

Updated on 15 April 2026 by ScegliAuto

Video tutorial

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How to Replace the Battery in a Yamaha Vino 125 Scooter?

In this tutorial, you will see how to replace the battery in a Yamaha Vino 125 scooter, a very simple and quick operation. First, ensure that the key is not inserted for safety. Then, lift the rubber mat and, using a simple cross-head screwdriver, unscrew the two screws securing the plastic cover. Once opened, disconnect both terminals, starting with the negative, and remove the battery from its housing. To fit the replacement, simply follow the reverse procedure.

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