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Thread: 1981 ATC185S / ATC70 front brake

  1. #1
    Join Date
    Feb 2017
    Location
    Vancouver BC Canada
    --
    9

    1981 ATC185S / ATC70 front brake

    Looking for the bolt pattern measurements of a 1981 ATC185S front hub...the model with no front suspension and a three bolt hub. Want to add a drum style front brake to my '84 ATC70.
    Thanks
    Rick

  2. #2
    Join Date
    Jul 2009
    Location
    South Florida
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    6,722
    Hub is 3 x 100mm for the early s model .
    It’s the same bolt pattern as the atc70 .
    Last edited by shortline10; 08-26-2020 at 06:13 AM. Reason: Error correction , thanks Hairy , getting old sucks
    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

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  3. #3
    Join Date
    Jun 2013
    Location
    Oceanside, CA.
    --
    610
    Shortline was close, wheel hub bolt circle is 3 x 100mm. Find this an interesting modification, please post up your completed project. The s hub will need to be modified to keep the wheel centered.

    "HJ" Name:  oldfogey.jpg
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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

  4. #4
    Join Date
    Feb 2017
    Location
    Vancouver BC Canada
    --
    9
    Thanks for your help !

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