If you need to carry out maintenance on your own GAS GAS SM 400 FSE then it is usually recommended to own a Workshop Manual for a reference in case you need to know methods to remove a specific component for instance the Clutch and install it again in the correct manner.
GAS GAS SM 400 FSE Workshop Manuals offers you identifiable diagnostic information with regards to your car so if something is faulty it will help you figure out what the issue is and ways to correct it. Then you are able to determine if this can be achieved yourself or that the job is simply too big it is possible to book your SM 400 FSE right into a suitable garage.
GAS GAS SM 400 FSE manual