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Thread: 250cc Project X

  1. #1
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    250cc Project X

    This is my latest Project X 250cc ATC70 engine. This is a combination of two seperate Chinese 200cc OHC engines. To get their 200cc's, one model has a big stroke and small bore while the other has a big bore and short stroke. I have combined both models as in long stroke bottom end and big bore top end. It had its first test run last night and was very successful. Big HP everywhere.
    The next Project is a laid down 350X in a 70 frame.
    Attached Thumbnails Attached Thumbnails 250 project (5).jpg   250 project (3).jpg   250 project.jpg   250 project (2).jpg  

  2. #2
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    wow, what motor is that

  3. #3
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    That is awesome!

  4. #4
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    you guys have to much time on your hands!! lol


    That is cool to see something different.

    1985 Tiger 250LC
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    1985 ATC 350X
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    1973 ATC 70 (resto project)
    ATC 70 Full A+ Suspension Mini Tiger
    and many more!!!
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  5. #5
    Billy Golightly's Avatar
    Billy Golightly is offline Always finding new and exciting ways to not give a hoot in hell Catch me if you can
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    Awesome, just pure Awesome. You getting geared up to defend yourself against the 250R powered 70? You guys down there are just insane on that stuff.

  6. #6
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    Thats a wiring nightmare to me! But that will be pretty sick ones it runs.
    1986 200x- old school D.I.D wheels, Gold D.I.D X-Ring Chain, Rad MFG. Carrier, PRM Grab Bar, Pro Circuit T-4 custom, Maier plastics, 85x forks, 18x10.5x8 kenda klaw mxr's on itp steels, the money pit never ends

    2004 YFZ450 - CP 12.5:1, cam mod , gibson nerfs, hmf pipe, protaper bars + risers, dg bumper/skids, holeshot gncc's on itps, cycra handguard and more stuff to come.

  7. #7
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    Once it runs? It does run! Like I said, I took it it for a test ride on Friday night. It feels like a minature 350X. Once it's run in, look out.

  8. #8
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    Sorry I just saw that you tested it. Good work, i would never have been able to figure that out. Are you using the origional plastics and tank?
    1986 200x- old school D.I.D wheels, Gold D.I.D X-Ring Chain, Rad MFG. Carrier, PRM Grab Bar, Pro Circuit T-4 custom, Maier plastics, 85x forks, 18x10.5x8 kenda klaw mxr's on itp steels, the money pit never ends

    2004 YFZ450 - CP 12.5:1, cam mod , gibson nerfs, hmf pipe, protaper bars + risers, dg bumper/skids, holeshot gncc's on itps, cycra handguard and more stuff to come.

  9. #9
    mart is offline *CERTIFIED* Mad Scientist Arm chair racerAt the back of the pack
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    nice greenhuman there werent any leaks i hope?
    MARTS 84 300R 86 250R 700r raptor & suspended 250r in 70 frame

  10. #10
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    was this a twin cylinder motor? ive never seen a chinese motor that lays down in the front, just woundering

    edit: i'm talking about the plate on the top of the case.
    Last edited by SYKO; 12-31-2007 at 02:44 PM.

  11. #11
    ATCR250R's Avatar
    ATCR250R is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    That is just plain sweet! Looks like a quality job too. Nice work.
    ATCless at the moment...

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    Ya know Yamaha Owns 30% of Jianshee....got a yamie in that honda!!......Cool beans
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  13. #13
    Billy Golightly's Avatar
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    Quote Originally Posted by sykolincoln
    was this a twin cylinder motor? ive never seen a chinese motor that lays down in the front, just woundering

    edit: i'm talking about the plate on the top of the case.

    Thats where the cylinder use to be. Check under where its at now. Thats weld buildup that has been remachined so it will mount there

  14. #14
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    No leaks Mart, best weld job to date!
    These are Honda copies with late model specs like bearing cam, multi-plate cam chain , flywheel CDI pick-up, electric start and are super reliable.

  15. #15
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    I know this is a old thread but could you build one of these motors to go into a 200x? Also I'm talking about leaving it in its ORIGINAL form NOT modded into laydown style.

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