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Thread: A 90 transformation

  1. #1
    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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    A 90 transformation

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    This is ugly, we bought this years ago from a guy that said he raced it back in the day. Runs like a raped ape and we have no idea what is in it. So we are finally going to get around to seeing what this gal has inside her. The plan is to put it back together on the frame below, no bells and whistles just swap parts and maybe a little something here and there. We are partial to the rat rod look.
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    Stay tuned for the final transformation.
    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.

  2. #2
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    Always exciting to crack open an old race motor !!!
    Iíll guess a 54mm big bore and a 58mm stroker
    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
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    Quote Originally Posted by shortline10 View Post
    Always exciting to crack open an old race motor !!!
    I’ll guess a 54mm big bore and a 58mm stroker
    X2 I like the Hooker Header.
    * 1978 ATC 90/180 Pauter PJ1 / Springer "Team BAPP" Bike *

    * 1980 ATC 110/180 "Danny's Machine Works" 3D Sprint Dune Bike *

    * Nicholson 500 Race Bike *

    * HPATC Yamaha RD350 "Big Moe" Trike *

  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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    Stripped down, now to find a sandblaster.
    Attachment 254493
    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
    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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    Back from powder coating (penny chips)
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    58 stroker 53 big bore.
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    The stock frame with one of many fortified welds and added plates.
    Attached Thumbnails Attached Thumbnails IMG_20180921_205354430.jpg  
    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.

  6. #6
    Join Date
    Jul 2009
    Location
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    Well I was close lol , makes for a nice high revving powerful motor .
    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

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  7. #7
    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 shortline10 View Post
    Well I was close lol , makes for a nice high revving powerful motor .
    Still confused why this thing ran so good and was so responsive. Would clutch racing springs make any difference, obviously not in hp but performance of responsiveness?
    We have two others with more than likely the same stroke and bore. We have yet to duplicate the same performance. Difference in carbs is that the other two have mikuni on them and this has a jetted stick 110 carb. The other two have modified heads this one didn't even have that.
    Could it be we are overthinking this? By all the modification giving us more top end but loosing power at the lower rpm range? Is that something that you sacrifice with a modified head?
    Last edited by DAM shop; 09-22-2018 at 02:23 PM.
    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.

  8. #8
    Join Date
    Jul 2009
    Location
    South Florida
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    Just sounds like it was tuned just right and your other two still need some help .
    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

    My Feedback http://www.3wheelerworld.com/showthr...ck+shortline10

  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 shortline10 View Post
    Just sounds like it was tuned just right and your other two still need some help .
    I suppose that could be it. Dont get me wrong they run Great. I suppose they each have e their own personality.
    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
    lardog's Avatar
    lardog is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Looking good that is a Vey's frame that you have there , haven't seen too many of those.

  11. #11
    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 lardog View Post
    Looking good that is a Vey's frame that you have there , haven't seen too many of those.
    A veys, umm. Can you tell me more about the frame lardog?
    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.

  12. #12
    lardog's Avatar
    lardog is offline At The Back Of The Pack Arm chair racerFirst time rider
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    I think its a well built frame looks similar to a Nicholson not so much like a bandito I found one a few years ago. I have seen this frame in 3wheeling magazine.

  13. #13
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    LOL It could be ready to let go. They always run the best right before they blow into pieces.
    Looking good. Glad to see it being brought back to life.

    Quote Originally Posted by DAM shop View Post
    Still confused why this thing ran so good and was so responsive. Would clutch racing springs make any difference, obviously not in hp but performance of responsiveness?
    We have two others with more than likely the same stroke and bore. We have yet to duplicate the same performance. Difference in carbs is that the other two have mikuni on them and this has a jetted stick 110 carb. The other two have modified heads this one didn't even have that.
    Could it be we are overthinking this? By all the modification giving us more top end but loosing power at the lower rpm range? Is that something that you sacrifice with a modified head?
    * 1978 ATC 90/180 Pauter PJ1 / Springer "Team BAPP" Bike *

    * 1980 ATC 110/180 "Danny's Machine Works" 3D Sprint Dune Bike *

    * Nicholson 500 Race Bike *

    * HPATC Yamaha RD350 "Big Moe" Trike *

  14. #14
    DAM shop's Avatar
    DAM shop is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Nov 2015
    Location
    Davenport iowa
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    Got a roller
    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.

  15. #15
    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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    Desicon time, we have a 63 stroker crank and a long rod crank with a 4mm over piston ( both helm and son's) We are going to split the cases on old ugly here and see what stroker it has in it. We understand some of the benefits to a long rod Vs a short rod but if you have an opinion or preference we would like to hear it.
    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.

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