Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions
  1. Motorcycles
    2. :
  2. Derbi
    3. : Cross City 125
In this guide, you will learn how to dismantle and replace the crankshaft or transmission sprocket on the Derbi Cross City 125 in simple and quick steps. First, remove the sprocket cover by unscrewing the screws; then remove the two fixing screws of the sprocket using a socket spanner, as shown in the video. At this point, extract the sprocket by removing the chain; clean the area before fitting the new sprocket, checking the condition of the crankshaft oil seal. Then, apply the reverse procedure for reassembly!

Updated on 22 April 2026 by ScegliAuto

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