If you want to do maintenance on your own Suzuki VS 750 GL Intruder then it is always a good plan to own a Workshop Manual to keep just for a reference should you need to know easy methods to remove a particular component for example Gearbox and fit it again perfectly.
Suzuki VS 750 GL Intruder Workshop Manuals gives you particular diagnostic guidelines with regards to your vehicle therefore if something is broken it will help you identify what the problem is and some ways to resolve it. After that you can evaluate if you can do this by yourself or that the job is too big you are able to make a reservation for your VS 750 GL Intruder in with a decent friendly mechanic.
Suzuki VS 750 GL Intruder manual