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Thread: 85 atc125m motor swap...

  1. #1
    Join Date
    Mar 2018
    Location
    san antonio
    --
    2

    85 atc125m motor swap...

    FOUND A MOTOR https://www.amazon.com/Motor-HQ-Stro...6%3A1253497011 WAS WONDERING IF THIS WOULD FIT INTO MY 85 ATC125M. MY MOTOR THAT IS IN IT IS LOCKED UP AND RUSTED ALL THE WAY THROUGH...I THINK THIS WOULD BE A BADASS UPGRADE

  2. #2
    125Mmadness's Avatar
    125Mmadness is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Apr 2017
    Location
    McConnelsville,Oh
    --
    157
    It will probably work but, I'll always root for original Honda made engines. A really cool upgrade is a 1985-86 trx125 engine. It has 5 gears plus reverse.
    1985 ATC125M: Parts
    1985 ATC200S: 84 200S Bottem end, 200x Head, 200x Carb, S&S Cycle Exhaust, Wiseco 10.25:1 Piston, Reground Cam with About 1mm more lift(unknown specs).
    1988 TRX250X
    1983 ATC200E: Total Pile.


    "Bout Tree Fiddy" Master of Thy 22RE

  3. #3
    Join Date
    Mar 2018
    Location
    san antonio
    --
    2
    I will look into finding one...atv/atc engines are hard to come by in san antonio....thanks

  4. #4
    Join Date
    Apr 2014
    Location
    Edmond, KS
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    2,531
    The one that you gave the link to is only a three speed. On the plus side, it's a "5 stroke" engine. I would REALLY love to see one and have the engine strokes explained to me.

  5. #5
    Join Date
    Dec 2012
    Location
    Vancouver Island, B.C., Canada
    --
    812
    Engine looks like a decent option to me, but I'm not sure if it would mount stock. Would like to hear how you make out on this thread though because I have an '84 125M with a seized engine as well that I bought for 100 bucks. It's been sitting in the corner of my shop waiting for a replacement motor.
    1985 Honda ATC 250ES
    1985 Honda ATC 250SX
    1984 Honda ATC 200M
    1983 Honda ATC 200
    1984 Honda ATC 110

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