If you wish to accomplish repairs on your Honda VTX 1800 F then it will always be recommended to have a Workshop Manual to use as personal reference if you need to know proven methods to take out a specific component for instance the Gearbox and fit it again adequately.
Honda VTX 1800 F Workshop Manuals will give detailed diagnostic details on your car or truck therefore if something is faulty it can help you understand what the issue is and the best way to fix it. You will be able to decide if you can do this yourself or if the job is just too big you can book your VTX 1800 F into a trusted mechanic.
Honda VTX 1800 F manual