81 DT175 project bike.

Discussion in '2 smokers' started by seth0941, Aug 13, 2012.

  1. seth0941

    seth0941 NW Adventure Rider

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    Okay, this is my current project bike. I bought it as a non running bike that sat outside for about a year.

    Here is what it looked like the day I brought it home.

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    The rear brake was stuck but other than that it looked ok.
    #1
  2. seth0941

    seth0941 NW Adventure Rider

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    I decided to get it running before I did anything. Some how I got lucky and the fuel tank looks new inside.

    I had to take the petcock off and clean it and rebuild the carb. as well. She is a 1 kick start cold bike. I need to find specs on compression though, she only has 120 pounds.

    with that done I started taking it apart.

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    #2
  3. seth0941

    seth0941 NW Adventure Rider

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    The wheels need some work, they are round and not bent but rusty. I hope I can save them.

    The rear brake was full of dirt but looks good.

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  4. seth0941

    seth0941 NW Adventure Rider

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    Well she is in pieces now. ready to start the build. I don't know what direction I am going to go yet. I am thinking mostly stock.

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  5. Padmei

    Padmei enamoured

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    Wow the memories.
    I got a 79 DT175 as an apprentice many years ago. Loved it & hated it. The muffler was always choked with oil, back shoes only were good for half of their depth before locking the brake cam, used to carbon up & start screaming like a banshee while I would panic, turn the key off, pull the sparkplug out, get a whoooa of a whack off the plug then find something big & unmovable to ram the front wheel against till it died... My blood pressure is going up just thinking about it. Unfortunately I was always broke so couldn't afford to replace the kick starts. After number 3 I resorted to crashstarting each time... in traffic...in rushhour....
    It did teach me that a small less powerful bike can be as much fun as the IT250s & PEs of the time. And introduced me to the sport of enduros. I also did my first engine rebuild - got the slide stuck in the carb on reassembly & ran it in on the first kick at 10 000 RPM.

    Did you know that they brought them out again in 1989 & the price was the same as in 1979 - $1500.00
    #5
  6. seth0941

    seth0941 NW Adventure Rider

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    Nice... I did not get this because it was what I was looking for, I bought it because it was cheap and in decent shape. I thought if I am going to mess up a bike trying to restore it mine as well be a cheap one.
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  7. YZEtc

    YZEtc Feel lucky?

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    I have owned the exact same model in the past, myself (1981 DT-175H), and the bike was very basic, simple, and as reliable as a bike can be.
    It's too bad that Yamaha hasn't imported 2-stroke dual-purpose bikes over 50cc into the USA since 1981, as I can only imagine the kind of machinery they'd be producing in 2012 for that job.

    Edit:
    Actually, there was a DT-80K and DT-100K in the 1983 Yamaha line-up.
    Then, come 1984, it was all 4-strokes except for a couple of 50cc models.
    #7
  8. JWhitmore44

    JWhitmore44 pistolero

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    Nice little bikes that work well as mountain goats :) I rebuilt an 81 after it took a bath and nothing done with it. It was mostly cleaning an about $400 worth of parts. I did swap out the shock for one out of a DT400. Not sure how much that helped :) The spark arrestor on the end of your pipe looks to be non-stock.
    #8
  9. seth0941

    seth0941 NW Adventure Rider

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    Yep, someone welded an old school supertrap on to it. If anyone has a stock one I would love to find one. I also need the oil tank.
    #9
  10. seth0941

    seth0941 NW Adventure Rider

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    I just fixed all the photos.
    #10
  11. WVhillbilly

    WVhillbilly Long timer

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    Looks like a nice project.
    I've been riding by this for years. Never seen anyone around, would love to have it.

    Just because I hate to see it rot away.
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    #11
  12. seth0941

    seth0941 NW Adventure Rider

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    Knock on the door with a bottle of whiskey in the truck. Has worked for me in the past. Let me know how it turns out.
    #12
  13. WVhillbilly

    WVhillbilly Long timer

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    No house there anymore :cry
    Just this shed and an old outhouse.

    But someone cuts the grass, I don't think they ride the bike tho.

    I don't need it, but I want it. I friend of mine had one similar to it when we were kids and we rode that bike all over.
    #13
  14. seth0941

    seth0941 NW Adventure Rider

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    Okay, I worked on the bike today. I just reached into the box and pulled out a pice. I did not take a before photo but if you look at the first photos you can see it.

    I started by taking it apart and almost loosing the detention ball. Then I attacked it with a wire wheel till it looked new. I then baked on an industrial silver enamel paint. I know it is not factory original but I am not looking for that.

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    #14
  15. JWhitmore44

    JWhitmore44 pistolero

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    The wheels on the one I had looked about like yours. I never could get the spoke nuts to break free and most of the spokes and ended up replacing most of the spokes.

    WVhillbilly, is that a XL500S ? They had a 23 inch front wheel instead of a 21 so tire choices are kind f slim. There used to be a nice dual purpose tire that you could run though. The 500 was quite the tractor, I really liked mine.
    #15
  16. WVhillbilly

    WVhillbilly Long timer

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    I have not gotten that close to it.
    Picture was taken with a lot of zoom on the camera.

    Next time I'm by there I might put a note on it tho.

    Are there many parts available for these old bikes?
    #16
  17. JWhitmore44

    JWhitmore44 pistolero

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  18. seth0941

    seth0941 NW Adventure Rider

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    So, I pulled another part out of the box yesterday.


    before
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    Cleaned up before paint.
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    Finished.
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    #18
  19. MacNoob

    MacNoob piney fresh

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    I like the way you're going about this.

    I had a green '78 DT125. Neat bike. Careful with the monoshock, they have a nasty kick back over sharp bumps.
    #19
  20. WVhillbilly

    WVhillbilly Long timer

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    Are you using lots of wire wheel or chemical means to clean up parts.
    #20