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Thread: 1979 Honda ATC110 - How can I tell if it really is that

  1. #1
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    1979 Honda ATC110 - How can I tell if it really is that

    Previous owner indicated it was a 1979 Honda ATC110 however I am not sure.
    I've included pictures.
    The number on the frame is US90-2X1197.
    There is no tag on the motor below the shift lever for an engine number either.

    Is this really a 1979 ATC110?
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  2. #2
    DAM shop's Avatar
    DAM shop is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Frame is a 90, motor could be a 110, check at the base of the cylinder 89cc or 109cc it should say.
    90 nickolson Bored and Stroked "The Good"

    Big Bore 110 Pauter frame "The Bad"

    90 Bored and Stroked ?? "The Ugly"

    90 Nickolson Bored and Stroked "Waterloo"
    flat track build.

    1974 original 90 X 2

    1974 Original 70.

  3. #3
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    It sure looks like a US 90 carb on it with the altitude plunger or what ever Honda called it

  4. #4
    DAM shop's Avatar
    DAM shop is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Yep after a closer look at the pic, sledcrazy is correct that's a 90 carb.
    90 nickolson Bored and Stroked "The Good"

    Big Bore 110 Pauter frame "The Bad"

    90 Bored and Stroked ?? "The Ugly"

    90 Nickolson Bored and Stroked "Waterloo"
    flat track build.

    1974 original 90 X 2

    1974 Original 70.

  5. #5
    86125m is offline Got The Holeshot Arm chair racerJust too addicted
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    looks like a hodge podge of about 4 differnt bikes as I think almost all the parts swap between all year of the 90 all years of the 110 and the 84-85 125m

  6. #6
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    Thanks for the responses.

    We got this for free, it does run and would like to make it look "better"

    8612m - can you be more specific on what 4 different bikes?

    I also noticed the back of the front fender is rubbing on the frame. The fork does not look bent. What is the easiest way to tell if the fork is bent? or is it the wrong fender?

    The low/high range lever won't move either - any ideas?

  7. #7
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    The front tire (maybe all of the tires) look too big. If they're 25", they're too big. They're supposed to be 22". If they're 22", they're way over-inflated.
    85 Tri-Zinger 60
    86 ATC 250SX
    02 XR650L conversion
    84 ATC 480R

  8. #8
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    X2 on the over inflated front tire. That thing looks like a ballon ready to pop!
    1983 ATC 110
    1983 ATC 110
    1984 ATC 125m
    2003 CRF 450R
    2015 Suzuki M109R

  9. #9
    DAM shop's Avatar
    DAM shop is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Quote Originally Posted by bmw1 View Post
    Thanks for the responses.

    We got this for free, it does run and would like to make it look "better"

    8612m - can you be more specific on what 4 different bikes?

    I also noticed the back of the front fender is rubbing on the frame. The fork does not look bent. What is the easiest way to tell if the fork is bent? or is it the wrong fender?

    The low/high range lever won't move either - any ideas?
    BMW,
    I think what he means by 4 different trikes is.
    A u.s. 90 frame and gooseneck.
    The fenders are a later year they are plastic and not glass.
    Not sure the year of your motor without a serial number but it could also be from a different year.
    As 125 said all these parts will interchange with each other but it's not stock by any means and more than likely not a 110 motor. You do have the bones there for a good rider if that's all you're looking for.
    90 nickolson Bored and Stroked "The Good"

    Big Bore 110 Pauter frame "The Bad"

    90 Bored and Stroked ?? "The Ugly"

    90 Nickolson Bored and Stroked "Waterloo"
    flat track build.

    1974 original 90 X 2

    1974 Original 70.

  10. #10
    Join Date
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    bmw1, may not be totally correct but this is what I see.

    '72-73 US90 model frame.
    Motor is probably original or at least a 90 as the frame front motor mount bolts have not been elongated as the 110 cylinder is longer.
    Rear axle assembly is US90 style an would have used balloon tires front and rear.
    Can't see a clear pic of rear wheels but what I do see says adapter plates with steel wheels.
    Front wheel is one piece steel with a '75 an later 3 bolt axle assembly. Tire over inflated.
    Forks could be original as there was a similar red color offered that year, but could be '75 and later.
    Front fender looks like a 185 or 200 fender which is why it touches the head.
    Rear fender is plastic looks like '79 and newer.

    Price was right....

    "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

  11. #11
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    If that is an over inflated 22" tire and not a 25" tire then that thing is dangerous. I'd get the air out of there ASAP. It's probably stretched really bad if that is a 22".
    85 Tri-Zinger 60
    86 ATC 250SX
    02 XR650L conversion
    84 ATC 480R

  12. #12
    Join Date
    May 2018
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    Minnesota
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    Thanks again for all of the responses. I do appreciate.

    It does have 22x11x8 tires all the way around.

    The front tire is dry rotted and looks like PO put tubes in all the tires and then over inflated. I will probably get new tires or at a minimum, adjust the air pressure.

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