If you have to perform repairs on your own Yamaha LS 2 then it is usually recommended to possess a Workshop Manual to keep just for a reference should you want to know the right way to strip off a particular component such as the Exhaust and fit it again appropriately.
Yamaha LS 2 Workshop Manuals gives you specified diagnostic information for the car so if something is faulty it helps you work out what the issue is and ways to fix it. You can then assess if you can do this on your own or if the job is just too big you are able to make a booking for your LS 2 right into a decent mechanic.
Yamaha LS 2 manual