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How do you disassemble the engine of the Derbi GPR 125?

Model: Derbi Gpr 125
Part: Engine

Video tutorial

The disassembly of the Derbi GPR 125 engine can be done by loosening all the screws that fix the piece inside its housing, so that it can be removed. Once the engine is freed, it will be possible to loosen the screws that fix the clutch cover, which must be removed from its housing by loosening the fixing screws.

After the clutch has been removed, the screws fixing the semi-crankcase of the engine on the opposite side can be unscrewed, removing it and accessing further components inside. In this way, it will be possible to remove and replace the parts in the engine block.


Posted on 16 August 2025 by ScegliAuto


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How to Replace the Piston on a Derbi GPR 125

To replace the piston on a Derbi GPR 125, loosen the bolts securing the cylinder head to its housing, allowing it to be removed along with the valve cover. This will enable you to access the bolts securing the cylinder at the top of the engine, allowing for its complete removal and revealing the underlying piston. The piston can now be freed from its securing bolts, enabling you to position the new piston onto the corresponding conrod. After installation, refit the engine components.

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by ScegliAuto

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