If you wish to undertake maintenance to your Yamaha Royal Star Venture then it is usually recommended to have a Workshop Manual for reference if you need to know proven methods to take off a particular component for example Wheel Bearing and match it again in the right way.
Yamaha Royal Star Venture Workshop Manuals gives you special diagnostic wisdom with regards to your car therefore if something is wrong it helps you work out what the situation is and how to resolve it. After that you can assess if you can do this yourself or if ever the job is just too big it is possible to make a reservation for your Royal Star Venture in to a local mechanic.
Yamaha Royal Star Venture manual