If you choose to undertake repairs for your Suzuki RV 90 then it will always be recommended to own a Workshop Manual to use as reference if you need to know the best way to take out a certain component for example Exhaust and install it again safely.
Suzuki RV 90 Workshop Manuals gives you specific diagnostic info with regards to your car so if something is wrong it can help you find out what the situation is and methods to repair it. Then you are able to decide if this can be done yourself or if the job is too big you could book your RV 90 into a nearby car garage.
Suzuki RV 90 manual