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  #1  
Old 03-22-2004, 09:42 PM
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Default 77' DT 100 restoration

     

I'm new to this forum and was told by my neighbor this is THE site to look in. I receintly found a DT 100 in an old barn while I was cleaning it out for a friends family. I grew up riding one of these and had to get it for my son who is about the same age I was when I started riding a DT. The thing looked like it was mulching in the back corner for the last 25 years. It's actually pretty clean for a 30+ year old bike. Tires hold air and the seat is still intact. I cleaned the fuel system and replaced the battery and spark plug.
I got it running yesterday but still need to get the electricals sorted out. I disconnected the ignition switch and it runs now but none of the other electrical things work.
Is there any place to find a wiring diagram for this? I guess I need to find a working ignition switch too. Are parts still available for this anywhere?
Any help would be appreciated.
Larry
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Old 03-22-2004, 10:23 PM
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Default Re: 77' DT 100 restoration

i bought a junker '73 at-1 125 a few years ago and have been restoring it. i found everything that i needed, including a service manual, on ebay. it's a long process that way and some items can get a little pricey but so far everything has been satisfactory. i've got it about 85% complete.
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Old 03-22-2004, 10:38 PM
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Default Re: 77' DT 100 restoration

i got one like jays...i need a cylinder and piston-whole top end...i got the keys,ignition and paperwork and a manual -maybe the manual has wiring diagrams!...all the parts are at ebay...they are nice trailbikes
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Old 03-22-2004, 11:39 PM
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Default Re: 77' DT 100 restoration

my manual has wiring diagrams. it covers the years 71-73 and includes the LT 100. the wiring should be similar, if not identical to yours. i can scan it and email it to you if you want.
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Old 03-22-2004, 11:49 PM
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Default Thanks!

I checked out ebay and found some things that will help. Now all I have to do is win some auctions...
Larry
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Old 03-22-2004, 11:51 PM
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Default Re: 77' DT 100 restoration

Jay574
I PM'd you
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  #7  
Old 03-23-2004, 05:13 PM
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Default Re: 77' DT 100 restoration

Try the Yamaha website. It has parts diagrams of all their bikes back to the 1960's. You should be able to piece together a wiring diagram from that site.

For OEM parts, try www.yamatopdog.com They are probably the best site for original Yamaha parts.
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Old 03-23-2004, 06:00 PM
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Default Re: 77' DT 100 restoration

I wanna know how this turns out!! The 1977 DT100D was my first bike!!!!!!!
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Old 03-23-2004, 06:05 PM
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Default Re: 77' DT 100 restoration

BTW a quick search on e-Bay turned up tons of stuff for the bike.
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Old 03-23-2004, 06:56 PM
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Default Re: 77' DT 100 restoration

Quote:
Originally posted by Satch0922
I wanna know how this turns out!! The 1977 DT100D was my first bike!!!!!!!
Satch, you will never believe this but we share something close in common . . . A 1976 DT175 was my very first bike! I was so short that I had to start it while it rested on the kickstand. I had to develop some good riding habits early on mind you--I couldn't just dab indiscriminately, and the ultimate penalty was having a bike bigger than me lying on its side.
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Old 03-23-2004, 07:21 PM
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Default Re: 77' DT 100 restoration

D,
That's pretty cool! I had the opposite problem...the 77 DT100 was the first year they made the bikes smaller and even at 12 years old I was almost too big for it! LOL I got the bike brand new and less than a year later I was riding a 1977 YZ125D !!! Talk about a big step!
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Old 03-23-2004, 08:16 PM
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Default Re: 77' DT 100 restoration

Yea, that is a big step! After I got bored with the TY powerband, my first MX bike was a 1979 RM80--I could finally touch the ground--hurray!!!

But nobody told me about the razor-thin peaky powerband and its penchant for unsolicited third gear wheelies (it had six gears)!

Ahh, those were the days. I sure wish I had taken a pic of that old TY175. It is probably sitting in some bike scrap yard right now--or worse.
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Old 03-23-2004, 08:22 PM
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Default Re: 77' DT 100 restoration

Yep..Good ole days syndrome ........ here is a pic of my 77 YZ125. You can just see the DT100 in the background next to my brother's YZ125
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Old 03-23-2004, 08:31 PM
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Default Re: 77' DT 100 restoration

Beautiful vintage Yamaha!

Let's see . . . 1977, Yamaha 125 . . . I bet you were either wearing or wanting to wear those plastic red and blue Scott boots that Hannah wore around that time!
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Old 03-23-2004, 10:40 PM
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Default Ign Switch Found

I hope to have the electricals sorted out soon. Thanks Vintage Dave and Jay for the leads on wiring. The restoration is coming along. I'm starting to wonder how much work I should put into this. I'd love to restore it to a good/fine condition. But knowing how I was at 10 years old and how I think my son will be on this bike, it'll get really bashed.
I'll keep you guys posted.
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Old 03-23-2004, 10:53 PM
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Default Re: 77' DT 100 restoration

that looks pretty good. cool old bike.
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  #17  
Old 03-24-2004, 05:09 AM
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Default Re: 77' DT 100 restoration

That looks exactly like my old bike!

DCOX...I couldn't afford those Scott boots but your right..I wanted them!! I had to settle for good ole Hi-Points!
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  #18  
Old 03-24-2004, 10:14 PM
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Default What am I missing?

OK guys, now I'm stumped. I got an ignition switch in today and the bike still runs on the ON postion, stops running in the OFF position. Now the horn work, yet none of the other electricals have come back to life. No power at the headlight, tail/brake light, turn signals.
Did I miss something? I think I checked all the connectors inside the headlight. Are there other connectors on the bike I should check?
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  #19  
Old 03-25-2004, 06:22 AM
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Default Re: 77' DT 100 restoration

and you checked the bulbs?
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Old 03-25-2004, 07:52 AM
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Default Re: 77' DT 100 restoration

Quote:
Originally posted by Satch0922
That looks exactly like my old bike!

DCOX...I couldn't afford those Scott boots but your right..I wanted them!! I had to settle for good ole Hi-Points!

Hi-Points were the next best thing. Did you bend the front metal shin-guard flat like alot of guys were doing at the time?

[sorry I don't mean to rudely interupt the thread]
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