I just picked up this 70 AT1. It starts easy and sounds good. I have Evaporust on order for the fuel tank and the rusted parts. I want to go through and make it nice.
The po “wired” in two toggle switches in order for it to start. The switch in the pics is for power to the coil and the other switch was wired to each side of the starter solenoid under the gas tank. The key switch is missing and the wires are rigged to the toggles. I want to get the correct switch, but the wires are cut and I am at a bit of a loss where to reconnect.
  
 
 

Another one saved. That's good. Reminds me of chasing one up years ago that we'd sold new at work & ended up spending an hour or two fixing a problem on his other farm bike, then he decided not to sell me the AT1 electric. Was sitting in an abandoned house on the farm & probably still there. Wasn't a good day.

It's all color coded so you just need to look at the original loom.  Switch will have matching wire colors so shouldn't be hard at all. 

That'll look great once you get cleaned up a little bit. Just a word of warning... if those are the original tires, be cautious riding it around. I was riding my '71 175 with the original tires around inside my tract at slow speeds, then when I finally put new tires on I found they were massively dry-rotted, and had a huge crack on one of them. At speed, you could lose a big chunk of it, and that would not be fun. I put Shinko SR241 tires on mine, and  they look a lot like the originals, and they seem to handle really well.

The tires will for sure be changed, the rim strip is coming out from the rear wheel. The brake shoes also. I'll take a look at the 241'S. Were you able to find a 3.25-18 for the rear or 3.50-18?
I have a ton of parts already ordered.

Mine is a CT-1, so it originally had 3.50 x 18 rear, and 3.25 x 18 front. Shinko doesn't make a 3.25x18 in the 241 tires, so I went with 3.00 x 18 on front, and 3.50 on back. You could probably do the same with your AT1. Also replaced the rim strips and put in some heavy-duty tubes, and I was surprised to find the interior of the rims was completely rust-free, even though the outside of the rims was really roached with rust. I had more rust on my upper fork tubes than you do, but I was able to get it smoothed out and it's working fine. Used a lot of wet and dry sandpaper with WD-40.

Also replaced the brake shoes, and surprisingly the old ones were still well bonded and in good shape. But I just didn't want to take a chance on the pads coming loose. My main priorities were just spiffing it up a bit, making it safe to ride, and running well.

I should make a restoration post but,
So far i have the Shinko 241's mounted with new, tubes and rim strips (the rims cleaned up decent). The frame and swing arm, fork lowers and gauge mounting plate painted.
Hopefully soon to have a roller. I have the brake shoes on order and glad I did. The one rear shoe had delaminated. 
I also have all of the body parts in the hands of my very capable paint guy.

 

Nice little find there! I picked up one of these last year but it is not in quite as good condition with some parts missing, most of which I have sourced so far. 

Post up some pics of your work, or better yet start a rebuild thread, so we can follow along? 

Great find, doesn’t actually look that bad. Good luck with the build.