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Thread: 85' - 87' 250es changes

  1. 03-13-2004, 02:06 AM #1
    atcmatt
    atcmatt is offline Power User Got the holeshot
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    85' - 87' 250es changes

    Hey all,

    Does anyone know any changes that occured from 85 - 87 on the atc250es? Apart from the graphics. Any engine diffrences, carb etc?

    Thanks,

    Matt
    1980 ATC 70 Needs Restoration
    1985 ATC 250es Fully Refurbed
    1986 ATC 350x Mint Original
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  2. 03-13-2004, 01:33 PM #2
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    Dirtcrasher
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    Re: 85' - 87' 250es changes

    Quote Originally Posted by atcmatt
    Hey all,

    Does anyone know any changes that occured from 85 - 87 on the atc250es? Apart from the graphics. Any engine diffrences, carb etc?

    Thanks,

    Matt
    Not sure about the ES but for the SX....

    87 motor had a cam chain tensioner change and the changes Jeswinehart mentioned.

    Carb is the Keihin 08 or best SX or ES carb to date.

    87 got different swingarms and enclosed rear brakes, better sealing orings on the axle tubes.
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
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  3. 03-13-2004, 05:12 PM #3
    atcmatt
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    Im asking out of general intrest. Dirtcrasher, when you say diffrent swingarm do you mean completely diffrent design?

    Thanks,

    Matt
    1980 ATC 70 Needs Restoration
    1985 ATC 250es Fully Refurbed
    1986 ATC 350x Mint Original
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  4. 03-13-2004, 09:30 PM #4
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    broook
    broook is offline At The Back Of The Pack Arm chair racerFirst time rider
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    swingarm on the 86 250es can be removed. Carb had the cold start system added on the 86. rear axel bearings were sealed better. There were three different starter motors. At least two different sets of starter gears. Slightly different wireing harness. Different cam chain tensioner on the 87. i know for sure there was something else but just can`t think of it right now. :?
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  5. 03-13-2004, 09:31 PM #5
    ATCnut
    ATCnut is offline Got The Holeshot Arm chair racerJust too addicted
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    On the sx, the swinger is a lot different. The 85 hat the axle tube welded on,and the 86 has it bolted on
    ATCnut

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  6. 03-16-2004, 08:21 PM #6
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    atctim
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    Between 85 and 86 there are a ton of differences. Control switches are diff. Swingarm is a completely new design for 86. Rear hubs are diff. Rear brakes got an update too - much better seal design.
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