Reddit mentions of How To Get Your Motorcycle Up & Running: The Shop Manual For All Years Makes & Models

Just to be clear: restoring old bikes is a money-losing prospect. If the bike has sentimental value, or it's the bike you've always wanted, or it's a gift for that special someone, a massive rebuild and overhaul can be very satisfying. But unless you're in a really weird situation (like you have a mint bike that's untitleable and an identical bike that needs a lot of work but is legal, or something like that) you're not going to make money. On the other hand, if you've got one you ride regularly already and you want to maintain it yourself, that's a pretty valid course of action.

I do it for the satisfaction, myself. (Also to impress girls. When I met my SO she had two Rebels in storage. They'd been there for three years. Some carb cleaning, new fluids, and two new batteries later and she's mine. Heh.) Really, it's just a great feeling.

Let me recommend a book to you: How to Get Your Motorcycle Up and Running. I also like the guy's videos. It's a fantastic introduction to working on bikes.