If you have to perform maintenance tasks for your Diamo Velux 250 then it is usually a good plan to have access to a Workshop Manual to use as a reference in case you want to know how you can strip off a specific component including Clutch and fit it again safely.
Diamo Velux 250 Workshop Manuals can offer you particular diagnostic details for the automobile so if something is not working it can help you understand what the issue is and ways to resolve it. You can then assess if this can be achieved by yourself or in the event the job is simply too big you could make a reservation for your Velux 250 right into a decent garage.
Diamo Velux 250 manual