'71 CT70 ...saved from the grave yard

Discussion in 'Some Assembly Required' started by SCR100, Oct 24, 2017.

  1. SCR100

    SCR100 Been here awhile

    Joined:
    Sep 14, 2015
    Oddometer:
    855
    Location:
    Rock Hill, SC
    I pulled this out of the local bike boneyard yesterday. It's rough as a cob, but for only $40 I couldn't resist.
    Almost everything on it is stuck, rusted or rotten, but all I really wanted was the frame and some hardware.

    [​IMG]
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    So far, all I've done is dragged it into the garage....because it won't roll...and sprayed everything with PB Blaster in preparation for disassembly.

    I have lots of questions and could use some guidance. Below is a list of things I'd like to do and a couple of pics for inspiration. Anything you can tell me is appreciated.
    I'd like to do:

    * Fork swap. USD or conventional hydraulic?
    * Front disc
    * Aluminum swing arm, probably the extended one. What do you do about the brake rod and stay with the extended arm?
    * 12" wheels. I re-use my old rear hub. Do the disc swap front hubs accept the 12" hoops?
    * Big motor....140-160cc. Would also like some suggestions on brands/size for this. Lifan, Piranha, SSR, etc.

    [​IMG]
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    #1
  2. SCR100

    SCR100 Been here awhile

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    It's surprisingly hard to work out all the details on this type of build. I'm on PlanetMini's and LilHonda forums, some Facebook groups, etc. It seems that a million people have done thises things but getting actual answers is tough. Maybe it's some sort of secret society... "The first rule of custom minis....".
    #2
  3. villageidiot

    villageidiot Long timer Supporter

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    not sure if it will get you anywhere, but the dudes from "turbo teds" in costa mesa, CA have a small fleet of these custom mini's

    ted's a nice dude, maybe he can point you in the right direction. theyre a bmw service shop.

    ill be watching.
    #3
  4. dwdantzler

    dwdantzler Been here awhile

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    You need to talk to Carlo Gagliardo

    Carolina Cycle Service
    5922-B Stockbridge Drive
    Monroe, NC 28110
    P: 704-821-6866
    http://carolinacycleservice.com/

    tell him Stumpy sent you
    #4
  5. Bt10

    Bt10 Been here awhile

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    Don't forget Fasterminis and chinariders and tboltusa. But yeah, when you figure them out, let us know too, please.
    #5
  6. Al Tuna

    Al Tuna NSFW

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  7. SCR100

    SCR100 Been here awhile

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    Hey, that's right up the road from me! Really good to know of places like that close by. I'll definitely be in touch or swinging by there.
    #7
  8. tntmo

    tntmo Oops, I did it again.

    Joined:
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    I have done a few Trail 90's but never a 70. For some of the stuff you want to do, it may be a good idea to look at some pit bikes selling in the area. Sometimes they sell cheap and have the engine, wheels, forks, etc. that you may want to use. Just an idea, good luck with your project.
    #8
  9. dwdantzler

    dwdantzler Been here awhile

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    He has built the most insane mini roadracers over the years. Mostly based on the honda 50/70 baseline. His work is factory level.
    #9
  10. ArdenLoneWolf

    ArdenLoneWolf Adventurer

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    Location:
    Northshore, MA
    IMAG4707.jpg IMAG4716.jpg I'll be following closely, just picked this up off CL last weekend. 1971 CT70H with the four speed and a key. Not as rusty as yours but I'm trying to decide between a 125cc pit bike motor or trying to get the original motor running.
    #10
  11. SCR100

    SCR100 Been here awhile

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    This is one instance where I don't feel bad at all about throwing away most of the bike and going full custom!
    #11
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  12. Pezz_gs

    Pezz_gs Cant ride for crap

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    This is a CBR150 motor in a CT

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    #12
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  13. SCR100

    SCR100 Been here awhile

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    Too bad we don't get that bike in the states.
    #13
  14. villageidiot

    villageidiot Long timer Supporter

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    i have a friend with one, and a plate.
    #14
  15. Pezz_gs

    Pezz_gs Cant ride for crap

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    Do you get the CBR125R??

    I built a RV125 with a PE175 motor in it. Didnt start with much either

    [​IMG]

    into this

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    #15
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  16. GR0NK

    GR0NK Got some screws loose!

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    My experience at planetminis was the same. I just keep digging through posts until I find the info.
    Also it seems that the parts to custom a CT70 is either dirt-cheap from China or crazy-expensive from Japan. You may have started with $40 but the bike you posted at the end of your first post is probably upwards of $2500 plus a lot of your time.

    I recently fitted a Chinese pitbike front suspension on an old CT70 frame just to get a disc brake.

    20171021_184829.jpg

    I threw a CT70 rear wheel on it just to see what it would look like but I will probably try to make a spoked wheel fit, maybe an ST90 wheel.
    Originally I had put the front end on an ST90 frame.

    20171021_145426.jpg

    However I didn't have a running motor for that frame (motor mounts are different) so I moved it to the CT.

    The Chinese pitbike front-ends use the Z50 length steering stem so I had to add a few inches to it for everything to work.


    Sean :brow
    #16
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  17. lesman

    lesman Live easy, Brake Hard

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    Screw the lifan stuff. I was at a custom car show. Ct70 with a Honda 175 motor.
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    custom v twin
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    #17
  18. Dread_lion

    Dread_lion Been here awhile

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    let me tell you guys my experience. first of all, those things when they are original, are worth a small fortune here in Belgium. secondly, everyone here seems to love the cheap chinese stuff. i had the chance to get one cheap at work ( a chinese one), and ended up throwing part after part on it. i eventually sold it, because everytime i fixed something, something else would break. So unless you are going to be rebuilding with mostly original Honda parts, or decent quality japanese ($$$$) i wouldnt expect it to be too reliable. there is a reason why the chinese parts are cheap, its mostly because they are crap. i have heard some of the engines are pretty reliable, but i couldnt get mine to run more than a few km's without having issues. whereas my honda's just kept on going, once they where overhauled.
    just my humble opnion.
    #18
  19. GR0NK

    GR0NK Got some screws loose!

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    Funny enough, all the Honda engines I get are in various states of disassembly because they stopped working for whatever reason.
    I have had about a dozen Chinese clone engines and they are much more reliable than the old Hondas. They are actually licenced by Honda and made using better materials and better techniques than the old motors. CDI over points anyday. I have several of these engines that are more than a decade old and have been beaten mercilessly since new. The Chinese frames wear out and break but the engines keep on going.
    It is often cheaper to buy a $350 Chinese clone engine that will bolt right into place rather than spend the money to repair an original Honda.
    Not saying it's always better, just saying that it's often more economical. They also come in displacements far greater than the original Hondas so it is very enticing to bolt in a 16hp YX140 where a 7hp 90cc motor used to be.


    Sean :brow
    #19
  20. MichiganMachete

    MichiganMachete Adventurer

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    Grand Rapids, MI
    check these dudes out, they are trail 70 specialists and carry just about everything you could ever need, including lifan motors.

    http://mytrailbuddystore.com
    #20
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