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Fatcaaat CL125 build thread. First vertical engine build i have done

This is a discussion on Fatcaaat CL125 build thread. First vertical engine build i have done within the Z50, CT70 and JDM Monkeybikes forums, part of the General Talk category; Very, VERY cool....

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Thread: Fatcaaat CL125 build thread. First vertical engine build i have done

  1. #16
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    66Cooper's Avatar

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    Very, VERY cool.
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    Exhaust

    I spent time doing the exhaust today. It was actually pretty easy to do this and it came out just as I wanted it. It may not be as pleasing to the eye to some, but this was absolute purposeful in that it allows that hallow center of the bike to really stick out. I started with the stock crf230 header and expanded to 1.25 then to 1.375 and then used 1.5 mandrel bends that were chopped and welded back together. It all came out pretty good I must say. I have a 17" long reverse cone muffler on there that I had in the shop. I may elect to use it or may go with something a little shorter like a supertrapp.
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    kirrbby, cbinvb and Quinc like this.

  3. #18
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    Lookin' really nice, good job, can't wait to see finished product!

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    Am103's Avatar
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    I really really like where this is going....MORE PICS!
    Not addicted. Hidden Content

  6. #20
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    I have the beast running now. https://youtu.be/4HqiuBEUZtQ

    This is just the recommended webcam grind, stock carb jetted 48/125 and a the stepped exhaust using the stock header. Goes from 1.125 to 1.25 to 1.375 to 1.5 to the reverse cone. It revs surprisingly quick.

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    a little progress

    I am making a little bit of progress...held up by the fact that my tool to enlarge the triple tree got lost in the mail...so had to reorder one.

    The wheel spacing is correct, although the axle is a little shorter than I'd like...so I need to find another axle for that I think. The upper triple tree needs to be enlarged from 44mm to 45mm...this is from an RS125 and was the closest I could find for my fastace triples. These are 173mm wide and have a 55mm offset. I also had to swap the stem out of these for a ct70 length stem...no problem there.

    The good news is that the triple trees do not hit the tank, like the first set did, thanks to that offset.

    The headlight brackets you see here are too long and look out of place, so I ordered up some other ones that push the headlight back about 1.5" closer to the trees. From a fabrication point of view, the only thing left is the front brake caliper bracket and the foot peg connections to the rear brake and the shifter. Only part I'm missing is a throttle cable.

    Once it is all together and functioning, I may keep it assembled until the spring when I can take it back apart and have it powdercoated. I am undecided on the swingarm if I will keep it or make another one. This one is not perfect but certainly servicable.
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    minishifter and kirrbby like this.

  8. #22
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    is When minibikes are outlawed,
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    Looking good, Jarred!

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    Well, the tool to open up my top tree is sitting in California and the headlight brackets are sitting in New York. These are the two items preventing me from having a roller at this point. I'm getting anxious!

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    still delayed on the top tree, but I did manage to get all of the bike wired other than the headlight and the controls. Also, I fabbed up the brake mount for that brembo crab I'll be running up front. This is made from 1/4" 6061 Aluminum. I have to metal finish it, but it will be PC'd anyway, so not too concerned. This ought to stop the beast. Same crab caliper going to be used on the back as well.
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    This build is AMAZING and now I want one lol.

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    It's really coming together. Only problem I have with it is that you make it look so easy
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  13. #27
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    THe g'craft triple trees are from an RS125 with 44/48mm tree bores. The fast ace are 45/48. So the trees had to be bored out on the top. So we spent about 2 hours taking care of this. 45 minutes was spent screwing around with the gauge that worked great for the first one, but then the indicator needle fell off, and then the rest of the thing messed up. Eventually, I smashed it to the ground and did the second one by eye/hand without indicating it...worked fine.

    Here's my buddy mike working on getting the machining done.
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    The tree was then installed, the headlight brackets, speedo/tach, and the headlight bucket. Handlebars attached. Starting to shape up. I just have to install the neck bearings, install the brakes, shorten the rear axle, and finish up some wiring and we'll be ready to test drive.
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  15. #29
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    It's really coming together now!
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    In this lighting the bike almost looks steampunk.

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