Good resource for Yamaha Manuals?

First time Yamaha owner here.. and I gotta say.. i'm hooked.

My question is.. where is a good resource to find owner/repair manuals for older yamahas?

My current yamaha is a 76 DT 400.. i'm completely in love with it!

I know my way around an engine for the most part.. it would however help if I could get my hands on the service manual.. even the owners manual. It currently has no lights except the head light. I usually use it for the bush.. but in the last few days.. am now thinking of putting it on the road.. So wiring would be my first priority.

Also.. I noticed there's a battery under the seat.. yet I don't see an electric start.. only kick. Mind you it kicks over in one kick. Am I wrong.. does it have a starter?

Any info would be great!! Thanks in advance!

-Derwood