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Thread: Biggest ATC 90 motor ever 275cc WOW

  1. #16
    bandito90's Avatar
    bandito90 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2008
    Location
    Pa
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    284
    Sounds good,Anybody know who will make a stroker crank,besides the one Powroll offers?
    1978 bandito framed atc90
    1984 YT60
    1974 rd60
    2002 Buell Blast
    1984 Honda xr100 project in the trunk of my car.
    1964 honda C100
    1981 Honda Hobbit
    1984 Yamahopper

  2. #17
    Join Date
    Mar 2007
    Location
    Texas
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    5,045
    according to that article stroker crank was not used.
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  3. #18
    Join Date
    Dec 2004
    Location
    Baltimore, MD
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    6,088
    John, why do you say you still have cases and a crank left! LOL You're killing me man.
    Nicholson 500x (Project)
    Nicholson 185s
    Nicholson 110 (That takes an atc70 tank)
    Ascott 500 head/350x (Project)
    Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
    PK Racing Suspension 70
    A+ Inc Suspension 70
    AWS Aluminum 90 frame
    Hi Performance ATC Suspension frame rd350
    Hi Performance ATC Suspension frame 90

  4. #19
    bandito90's Avatar
    bandito90 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jun 2008
    Location
    Pa
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    I'm asking as I possibly want another stroker crank for my 90.
    1978 bandito framed atc90
    1984 YT60
    1974 rd60
    2002 Buell Blast
    1984 Honda xr100 project in the trunk of my car.
    1964 honda C100
    1981 Honda Hobbit
    1984 Yamahopper

  5. #20
    Join Date
    Jul 2009
    Location
    South Florida
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    6,810
    Quote Originally Posted by bandito90 View Post
    I'm asking as I possibly want another stroker crank for my 90.
    Powroll is your only source that I know of that still makes them .

    I just picked up a really nice 61.5 H&S stroker for my next 110 project .

    Just have to keep a look out for a good used one.
    78 atc 90/180cc Dickson Full Suspension
    76 ATC90/180cc Nicholson
    77 atc 90 Dickson Full Suspension
    84 KLT 110/123cc Powroll Racer from 80s
    87 atc 125m stock
    84 atc 200x Curtis Sparks
    84 atc 200x Powroll My race bike from 80's
    83 atc70/108cc Powroll blue Xmas Special
    81 atc185s HP-ATC full suspension

    Performance Shop is Open PM me for Service

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  6. #21
    Join Date
    Feb 2003
    Location
    Australia
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    927
    Quote Originally Posted by Vealmonkey View Post
    John, why do you say you still have cases and a crank left! LOL You're killing me man.
    I also still have a set of 90/110 cases modded to accept a 200X top end. They were crazy days.

  7. #22
    Join Date
    Dec 2004
    Location
    Baltimore, MD
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    6,088
    Timmy, Powroll still strokes them, but they don't stroke them as big as they did since most of these cranks are over 20 years old! You need those
    90/200x cases. The other cases and crank may be spoken for!!!!
    Nicholson 500x (Project)
    Nicholson 185s
    Nicholson 110 (That takes an atc70 tank)
    Ascott 500 head/350x (Project)
    Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
    PK Racing Suspension 70
    A+ Inc Suspension 70
    AWS Aluminum 90 frame
    Hi Performance ATC Suspension frame rd350
    Hi Performance ATC Suspension frame 90

  8. #23
    Join Date
    Jan 2003
    Location
    Ripley Tn
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    1,363
    I think 90crazy was looking for this
    85 Atc 70
    86 Atc 125m
    85 atc 350x
    86 atc 250r
    86 Atc 250r TT build
    85 Big Red bought brand NEW
    2012 Honda Goldwing Gl1800

  9. #24
    Join Date
    Mar 2010
    Location
    MN
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    632
    I was talking to a guy that said he has the 90 named Frankenstien I guess... He claimed there is a magazine article about it but I've never seen that particular one. Anyone heard of it??

  10. #25
    Join Date
    Nov 2006
    Location
    Geraldton, Western Australia
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    81
    think this is a 750. found this picture ages ago



    my rides: 86 250r, 84 200es & 82 185s

  11. #26
    Join Date
    Feb 2003
    Location
    Australia
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    927
    It looks like I am getting back one of my ATC90/XL175 conversion engines. It is complete and is extremely rare.
    I am looking to see if there is any interest out there in owning one of the rarest and most powerful ATC90 motors ever built.

  12. #27
    Join Date
    May 2007
    Location
    Coshocton, Ohio
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    1,815
    I don't think you'll have a problem finding someone interested in that. I would be but I doubt if I could afford it. I've already spent thousands on all of the period correct parts for my Bapp Bandito build. I'm just in need of a big bore cylinder and piston to finish it up.
    Appalachian American Racing
    the home of
    Appalachian American Engineering



    "Can't", never could do nothing



    There's nothing like the sound of screaming 2strokes and the smell of race gas in the air

  13. #28
    Join Date
    Nov 2015
    Location
    Davenport iowa
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    1,144
    Posting in this thread so I can save it.
    90 nickolson Bored and Stroked "The Good"

    Big Bore 110 Pauter frame "The Bad"

    90 Bored and Stroked “vey’s frame” "The Ugly"

    110 JSC frame Bored and Stroked
    flat track build. “Shop trike”

    1974 original 90 X 2

    1974 Original 70.

  14. #29
    Join Date
    Apr 2011
    Location
    Connecticut
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    1,605
    Quote Originally Posted by DAM shop View Post
    Posting in this thread so I can save it.
    Thanks for digging this old thread up!

  15. #30
    Join Date
    Jun 2013
    Location
    Oceanside, CA.
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    613
    Talk about bringing up old memories, saw that motor being built when H&S bored my 110 cases for their 67mm stroker crank for my 205cc alcohol motor. Sorry I sold that motor/bike can never replace it.

    "HJ" Click image for larger version. 

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    ’84 YT60
    ’85 350x (423cc) with ’81 XL500 head conversion
    ’83 XR500 (628cc) converted 3 Wheel hybrid
    ’73 CB750 K3 converted 3 Wheel hybrid
    ’86 TRX250R chassis XR650L engine hybrid
    ’89 TRX250R (stock )
    ’90 LT500 Quadzilla
    ’85 FL350 Odysses ( water cooled head )
    Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
    added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange

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