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AT1 Project

  • Clegg
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AT1 Project was created by Clegg

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.
  
 
 
1971 SL350, 1973 Bultaco Matador, 1978 XS650, 1979 MX175, 1982 XT250, 1982 GS650, 1982 CB450T HAWK, 1979 IT175, 1977 Suzuki TS185
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Last edit: 14 May 2022 08:02 by Clegg.
14 May 2022 07:43 #1

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Replied by RT325 on topic AT1 Project

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.
14 May 2022 16:10 #2

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Replied by MarkT on topic AT1 Project

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. 
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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14 May 2022 16:29 #3

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Replied by Tom P on topic AT1 Project

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.
Last edit: 15 May 2022 07:39 by Tom P.
14 May 2022 18:47 #4

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  • Clegg
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Replied by Clegg on topic AT1 Project

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.
1971 SL350, 1973 Bultaco Matador, 1978 XS650, 1979 MX175, 1982 XT250, 1982 GS650, 1982 CB450T HAWK, 1979 IT175, 1977 Suzuki TS185
Last edit: 14 May 2022 19:33 by Clegg.
14 May 2022 19:30 #5

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Replied by Tom P on topic AT1 Project

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.
14 May 2022 19:49 #6

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  • Clegg
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Replied by Clegg on topic AT1 Project

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.

 
1971 SL350, 1973 Bultaco Matador, 1978 XS650, 1979 MX175, 1982 XT250, 1982 GS650, 1982 CB450T HAWK, 1979 IT175, 1977 Suzuki TS185
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Last edit: 25 May 2022 20:18 by Clegg.
23 May 2022 14:03 #7

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Replied by nhsteve on topic AT1 Project

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? 

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07 Jun 2022 05:12 #8

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Replied by DT-Steve985 on topic AT1 Project

Great find, doesn’t actually look that bad. Good luck with the build. 
07 Jun 2022 09:52 #9

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