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Thread: My ATC 70 Build w/ Piranha 150 motor

  1. 04-10-2014, 11:14 PM #1
    250rmanfmf's Avatar
    250rmanfmf
    250rmanfmf is offline Got The Holeshot Arm chair racerJust too addicted
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    My ATC 70 Build w/ Piranha 150 motor

    Here is a project I finally have gotten around to. I bought the bike two years ago and it sat. Now I ordered lots of parts and did some welding and have a good start to my project. I am using a 150cc piranha E-start motor. I ordered the front brake kit and rear brake pedal kit. I still need to sand and polish the red plastics. I also need to mod the gas tank as carburetor hits.

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    85 ATC 250r -Under Construction
    86 TRX250r
    05 KFX400
    02 400EX
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  2. 04-10-2014, 11:21 PM #2
    Darius1502's Avatar
    Darius1502
    Darius1502 is offline Power User Got the holeshot
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    Wow...I'd love to ride that. I loved my little 70....gotta pick on of those up again!

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    1986 ATC 250r, 1986 Tri Z, 1990 LT 500R "Quadzilla"


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  3. 04-10-2014, 11:35 PM #3
    MattDragontamer's Avatar
    MattDragontamer
    MattDragontamer is offline Just Too Addicted Arm chair racerJust too addicted
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    I would love to have that engine, but the cost is waaaayyy to high. Looking good, keep'em comming.

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    1973-74 Honda ATC 70 Chrome Custom

    Argo (ODG) Taurus 650, Pacesetter WR-PIII, Commuter 380, TE390, Granger, Sasquatch, John Deere AMT 600, Honda 250es & sx

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  4. 04-10-2014, 11:37 PM #4
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    Keith Salyer
    Keith Salyer is offline Got The Holeshot Arm chair racerJust too addicted
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    Looks like a lot of fun to build and ride.
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  5. 04-10-2014, 11:54 PM #5
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    jakep53
    jakep53 is offline Got The Holeshot Arm chair racerJust too addicted
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    Very nice work!! it will be a load of fun to ride!!!
    73 atc 70
    84 ytm 200ern
    79 atc 70
    ytm 225 dr
    atc 90
    80 atc 110
    klt 250A
    84 atc 200es
    85 atc 250es

    gone but not forgotten restored 82 atc 70
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  6. 04-11-2014, 12:56 AM #6
    John jr
    John jr is offline First Time Rider Arm chair racerNew to the board
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    Looking good. Your going to love that motor.
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  7. 04-11-2014, 04:23 PM #7
    JasonB's Avatar
    JasonB
    JasonB is offline Formerly "ATCaddict" Lord of the trike
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    sweet 150 man! entire build is looking great so far keep at it

    also are those just the ebay hubs that fit the 250r etc? I am getting the 70 bug and learning as i go. total newb question lol
    TrikeFest 07,08,09,10,11,12,13,14 SandPuppie's Ride 07,08,09 Imperial Invasion 09, 13
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  8. 04-11-2014, 06:22 PM #8
    250rmanfmf's Avatar
    250rmanfmf
    250rmanfmf is offline Got The Holeshot Arm chair racerJust too addicted
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    Thanks for the support guys. The hubs are trx450r extended G-force hubs. 250r hubs wont fit the atc70 axle. I extended the frame also 2 inches. I am hoping to get exhaust and electronics all tucked away by end of next week then I need to polish the front and rear fenders.
    85 ATC 250r -Under Construction
    86 TRX250r
    05 KFX400
    02 400EX
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  9. 04-12-2014, 01:04 PM #9
    John jr
    John jr is offline First Time Rider Arm chair racerNew to the board
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    Here's a little video of my ATC 70 - 150 E-start on the sand so you can get a Idea of the fun & power. I'm on the black tanked 70, following my little brother who's riding my wife's 73 ATC 70 with a 114cc Piranha motor.
    http://youtu.be/9urNlq3AMCk
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  10. 04-12-2014, 10:51 PM #10
    250rmanfmf's Avatar
    250rmanfmf
    250rmanfmf is offline Got The Holeshot Arm chair racerJust too addicted
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    John, Very cool video, your bike looks like a lot of fun. I hope to head down to Oregon dunes next year when I get this 70 and my 250r and Tecate done.

    I tried polishing the front fender today and had no such luck. All I am left with is a dull finish that wont shine up. I sanded with 400 and 800 grit and buffed with rubbing compound and then polishing compound. I don't think they are oem fenders as I believe they are maiers. So I need to figure out this polishing of fenders as they have lots of scratches and look like crap. If I cant figure it out then I guess I will just buy some new ones.
    85 ATC 250r -Under Construction
    86 TRX250r
    05 KFX400
    02 400EX
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  11. 04-13-2014, 08:49 PM #11
    250rmanfmf's Avatar
    250rmanfmf
    250rmanfmf is offline Got The Holeshot Arm chair racerJust too addicted
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    more pics

    Have more pics. I am having issues with tank hitting the carb big time. I will probably dent the tank a little and shim it up but I am trying to figure out what to do.

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    85 ATC 250r -Under Construction
    86 TRX250r
    05 KFX400
    02 400EX
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  12. 04-13-2014, 09:39 PM #12
    rg97's Avatar
    rg97
    rg97 is offline Roostin' Away Arm chair racerRoostin Away
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    I gotta ask... What the heck is in the bacgkround of pic #9 from your first post?
    1983 212x "Mickey Dunlap" Powroll TT Trike -Blue frame, Supertrapp (looking for a Powroll DD), WEB Stage II cam, Powroll 6mm stroker, Wiseco 10.25:1 piston stock bore, ported, polished, +2 Swinger,White low-pros and 250R front fender, BAPP rear shock, Powroll Decals, NOS Carlisle R/A's

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  13. 04-14-2014, 01:11 AM #13
    John jr
    John jr is offline First Time Rider Arm chair racerNew to the board
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    Quote Originally Posted by 250rmanfmf View Post
    Have more pics. I am having issues with tank hitting the carb big time. I will probably dent the tank a little and shim it up but I am trying to figure out what to do.

    Click image for larger version.  Name: 101_1664.JPG  Views: 84  Size: 2.39 MB  ID: 191163Click image for larger version.  Name: 101_1663.JPG  Views: 95  Size: 2.26 MB  ID: 191162Click image for larger version.  Name: 101_1662.JPG  Views: 98  Size: 2.24 MB  ID: 191161
    You have the right Idea with the gas tank. Most do dent the tank to get the room. I use the bigger fiberglass gas tank that has a big knock out where the carb goes and has plenty of room. last I heard, The guy that makes the tanks wont be doing anymore till the end of the year.
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  14. 04-14-2014, 02:00 AM #14
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    badandy
    badandy is offline First Time Rider Arm chair racerNew to the board
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    Very Nice...
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  15. 04-14-2014, 05:20 AM #15
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    jakep53
    jakep53 is offline Got The Holeshot Arm chair racerJust too addicted
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    looking very nice!! can you heat the manifold up red hot and bend it down to a flatter profile or build a custom one??
    and what exhaust is that?? got a link?
    73 atc 70
    84 ytm 200ern
    79 atc 70
    ytm 225 dr
    atc 90
    80 atc 110
    klt 250A
    84 atc 200es
    85 atc 250es

    gone but not forgotten restored 82 atc 70
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