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Thread: ATC 250SX and 250ES Differential Rebuild Tutorial

  1. #46
    Join Date
    Aug 2014
    Location
    South Louisiana
    --
    1,915
    Crap, I didn't mark the shims, broke everything down a week ago and I'm just reading this thread. A great one might I add.
    "Roll on 3"

    RIP Ol' Deuce

    "Long Live the ATC"
    Building: ATCr125x
    Riding: ATC200sx
    "I am not a mechanic, mechanics get paid for this. I do it because I enjoy it."

  2. #47
    Join Date
    Jan 2011
    Location
    Choctaw, OK
    --
    2,755
    If you read the manual, the allowed backlash is .018 which means there will be a tiny bit of movement of the pinion when its all assembled. If you have the shims switched, there will be allot of movement in the pinion. Pretty easy to figure out.

  3. #48
    Join Date
    Aug 2014
    Location
    South Louisiana
    --
    1,915
    Roger that, thanks
    "Roll on 3"

    RIP Ol' Deuce

    "Long Live the ATC"
    Building: ATCr125x
    Riding: ATC200sx
    "I am not a mechanic, mechanics get paid for this. I do it because I enjoy it."

  4. #49
    Join Date
    Jan 2011
    Location
    Choctaw, OK
    --
    2,755
    In fact, you can just set the ring gear in the case mating it to the pinion and tell which shim offers the smallest movement of the pinion.

  5. #50
    Join Date
    Feb 2017
    Location
    MO
    --
    50
    Awesome write up! Besides the fancy tools I followed this two by step and it worked great!
    1984 ATC 70
    1985 ATC 250sx sold
    1986 Yamaha 225 DRSsold

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