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Thread: Yamaha YZ80 to ATC Conversion

  1. 10-12-2006, 04:30 PM #16
    gravelord
    gravelord is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    200x shock would not be the way to go, i had a 200x the suspension was beat, but if i remember correctly it wasnt all that great, use a 250r shock of possible, or better yet, get a newer quad shock that has more travel, and make mounts - your going to be making mounts anyway. your whole project got me going - and i think im going to be doing a project based on a lightweight frame and a small 2-stroke engine, mainly for weight reduction, but mine will be indeed a budget project IF I DO IT, right now i dont have the funds or space to do it, but in the future it could be a possibility, i will be making a post on here in this forum to gather some information in a few days probably.
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  2. 10-12-2006, 06:01 PM #17
    jason 32's Avatar
    jason 32
    jason 32 is offline Just Too Addicted Arm chair racerJust too addicted
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    i was thinking of making my kx80 big wheel into a trike it rips and would be fun
    as hell
    it looks like the chain isnt going to line up right just yet !!
    take your timne and it will turn out great!! -- keep pics coming lol
    Last edited by jason 32; 10-12-2006 at 06:07 PM.
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  3. 10-12-2006, 07:02 PM #18
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    More Pics

    Well I worked for about 3 hours today on the tripple trees, the major problem was that the 200X used regular berrings and the YZ used tapered roller berrings. The switch was not to bad though, all I had to do was drill out the roller berrings by.042 to fit on the stem. I lucked out though, the stem happened to be the perfect length.
    I put a strieght edge to the sprocket today and the sprocket will ned to be bolted to the inside of the hub. The stock sprocket cannot be used however beacuse the dampening things stick to far out. I think my shop sells just plain stamped sprockets that bypass the dampening system, so I should be OK.
    Tommrow I will be mounting the swingarm. Also does anyone know if the 110 hubs will fit 70 wheels?



    http://i25.photobucket.com/albums/c9...irtbike015.jpg
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  4. 10-12-2006, 07:32 PM #19
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    KASEY
    KASEY is offline weee weeee weeeeeeeeeee ! ! ! The day begins with 3WW
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    so tell me how you drilled out a bearing race???? its twice as hard as tool steel!!!
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  5. 10-12-2006, 07:35 PM #20
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    Dremel and a Die grinder. .042 was a bit of an exageration. lol
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  6. 10-12-2006, 08:07 PM #21
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    Vealmonkey
    Vealmonkey is offline Power User The day begins with 3WW
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    The early 110 bolt pattern and the atc70 bolt pattern is the same, 3x100. On my suspension 70s', the triple trees were custom made and the forks are from something like an xl125. If you made your own trees, you could use the forks off anything you wanted to, you would just have to drill the right size hole. As far as fork springs, you can get heavier fork springs and forks from the pit bike aftermarket, all those 50cc pit bikes have some serious aftermarket support, disc brakes, billet and chrome everything. The only limit is your wallet.
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  7. 10-16-2006, 08:21 PM #22
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    Well I finally got back to work on it. Project was put on a short hold this weekend, I had to take the SAT. Anyway it's time for me to cut the strut for the swingarm. To do this I need the dimensions of a stock ATC 70 INFLATED wheel/tire. And maybe even to the center of the hub. Does anyone have these numbers? My wheels and tires have not come in yet and I want to get back to work.
    Thanks
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  8. 10-18-2006, 06:18 PM #23
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    I had a day off school today so I finished the swingarm, I was going to retro fit the one I had but I decided to make a new one. Anyways here are some pics.
    http://i25.photobucket.com/albums/c9...irtbike020.jpg
    http://i25.photobucket.com/albums/c9...irtbike021.jpg
    http://i25.photobucket.com/albums/c9...irtbike023.jpg
    http://i25.photobucket.com/albums/c9...irtbike022.jpg
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  9. 11-10-2006, 11:04 PM #24
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    cragster
    cragster is offline Got The Holeshot Arm chair racerJust too addicted
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    Lookin good. Keep up with the good work!
    Should be fun!
    Then you can have something to race with this trike:.....................
    http://www.3wheelerworldforums.com/s...highlight=80-r
    '86 200x
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  10. 11-10-2006, 11:08 PM #25
    oldskool83
    oldskool83 is offline Power User The day begins with 3WW
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    hope you plan to use dust seals, or else bushings will turn to junk fast.
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  11. 11-11-2006, 01:17 AM #26
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    Yup Ive got some dust seals from a CR80 that I will retrofit on. Hopefuly I will have my wheels/tires here soon and I can have a roller.
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  12. 11-11-2006, 04:52 AM #27
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    Aka_am
    Aka_am is offline Just Too Addicted Arm chair racerJust too addicted
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    This project is awesome, keep us updated, and lots of pics!
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  13. 11-11-2006, 11:10 AM #28
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    Jason Hall
    Jason Hall is offline Power User Roostin Away
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    Sweet project. I know the feeling when trying to build a convertion like yours. Eveything's a challenge. A little at a time & a bunch of Improvment's as you go. When I first finished mine I thought It looked good. A bunch of the board members helped me make It better. It's funny how other people can see thing's different. Keep up the good work & maybe we can have another 80 on the MX track at TF07.
    Attached Thumbnails Attached Thumbnails ATC 85R.jpg  

    83 ATC 60-R Cr60 converted with Zinger parts.
    83 ATC 70.
    83 Tri zinger
    ATC 85-R Cr85 engine on shortened 86-R frame.
    ATC450AF
    86 310-R Drag racer
    440 snowmobile powered custom built.
    87 Cr 500 Converted to Drag racer
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  14. 11-11-2006, 07:45 PM #29
    200X Racer
    200X Racer is offline New to the board Arm chair racerNew to the board
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    Thats a sweet little trike, Its fast I bet. If you dont mind me asking, what rear tires are those?
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