Like everyone else said, the first 2 necessary items are the service manual and a torque wrench or two.
If you don't want to go out and buy everything at once, you just have to accept the fact that as you research each job or mod you want to do, you'll probably have to go out and get something specific to that job. It adds time but don't be tempted to take shortcuts and make do with what you have. Nothing like messing around trying to improvise and then going out and getting the proper tool and seeing how easy the task becomes!
Oh, does patience count as a tool? It can't be purchased but you shouldn't tackle ANY project if you're under any kind of time constraints or stress. Working on your bike should be a joy, not a chore.
If you don't want to go out and buy everything at once, you just have to accept the fact that as you research each job or mod you want to do, you'll probably have to go out and get something specific to that job. It adds time but don't be tempted to take shortcuts and make do with what you have. Nothing like messing around trying to improvise and then going out and getting the proper tool and seeing how easy the task becomes!
Oh, does patience count as a tool? It can't be purchased but you shouldn't tackle ANY project if you're under any kind of time constraints or stress. Working on your bike should be a joy, not a chore.