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

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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; CBINVB challenged me to build something different from my horizontal platform bikes and I decided that seeing his Ape based on the Lifan Pony and ...

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

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

    CBINVB challenged me to build something different from my horizontal platform bikes and I decided that seeing his Ape based on the Lifan Pony and riding it, that I wanted to make a bike similar in size but bigger on power. Enter a honda CB or CL125.

    This build will be fully custom with the desired outcome to produce a bike that can cruise comfortably at 60mph, was about as physically the same size as a honda CL70, have a seat height about the same as a CT70, and have a seating position like a stock Norton Commando for comfort reasons. So, my vision has moved forward with the following:

    Honda CL125 Frame
    Honda CRF230F engine, ported, cammed with stock carb
    Custom Exhaust made by me
    Custom Swingarm made by me
    Ninja 250r wheels with brembo brakes
    Fast Ace 650 adjustable forks
    Gcraft triple trees
    Cafe style seat
    CG125 Chrome tank
    Billet aluminum rearsets
    LED headlight conversion
    Renthal CRF150r adult bars

    A lot of fabricating will need to be done to make this all work. Engine mounts top and front, swingarm from scratch, rearset mounts, seat and tank mounts, shock extensions, speedo mount, fenders, and exhaust all has to be done.

    I started this project back in September and will now start throwing some pictures of it. Enjoy.
    nielspbr, minishifter and cbinvb like this.

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    Frame

    I got the frame with a title in the mail. Fortunately and unfortunately I suppose it had damage that was unreported. The front downtube was cracked at one point and very bent. This worked in my favor since I wanted to change the length anyway to make getting the large CRF230f engine in and out easier. Also, the guy gave me a refund of half price, which worked out nicely. Got this frame with title very cheap in that regard.
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    Cut and chop

    So now that I had the frame, it needed to be cut and a new downtube installed. I mocked fitment up with the engine and cut the materials and welded in a different length. I intentionally cut it slightly angled and intentionally offset the tube...so the downtube is perfectly vertical now, but actually over to the non-exhaust side by about 1/2 cm. Did this to make sure I had proper clearance for the exhaust.

    You can see just how tight the engine fits in there.
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    Then I started doing some mockups so I can get a feel for what it looked like. I fabricated the front mounts, reused the original engine mounts from the CRF230f on top. I did have to enlarge the rear mounts on the frame so the engine bolts would fit in there. Starting to show a basic shape here.
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    Moving along it was time to work on the swingarm. Because the ninja wheels were wider, I did have to make the swingarm wider. I also ended up narrowing the sprocket carrier on the hub by about 2cm and removing 1cm off the total width of the wheel at axle point. But the swinger build was interesting. I decided to use bearings and also had to make a custom pivot bolt that would be used for another purpose as well...
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    Last edited by fatcaaat; 11-15-2016 at 01:09 PM.

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    TO mount up the rearsets, I had to make a custom pivot bolt and also mount to the existing brake hanger on the frame. I ended up drilling and tapping the brake thing so the rearsets could mount. I had to make the lower mount portion to work right.
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    Shocks

    The shocks I chose are pretty slick. Rebound and compression on each shock along with adjustable on the spring. Unfortunately, they were a tad bit too short, so I had to fab up something to lengthen them. Not hard to do, but that m16x1.25 thread was annoying.
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    rear brake

    rear brake was a bit annoying. I used a ducati st2 rear hanger but had to do extensive modifications to it. however, it fits nice on there.
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    engine

    I did have to do some work on the engine because I could not leave it stock. It was a perfect runner, but I wanted a little more out of it without sacraficing any reliability. So, I ported the head and added a webcam grind. the rest will stay stock. I used a soda blaster to blast the head and center cases, then took the the top end and covers off the bike to recondition them. The head and cases are natural aluminum and the cylinder and side cases were painted in engine enamel. Engine assembled with some nice stainless allens and mounted into the already satin black painted frame.
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    Nice work fatcaaat! Anxious to see the final product.

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    Can't wait to see how this is coming together. Hows the seat height?

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    I came in here hoping to see a CL125 fatcat!

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    Quote Originally Posted by Quinc View Post
    I came in here hoping to see a CL125 fatcat!
    Well, it IS a CL125 frame!

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    The mockup continues. Here I have mounted the rear wheel, cut the chain to size and completed the rear wheel mounting and spacers. I also started running the electric which will primarily live under the tank. A small battery box under the seat will conseal a small 4cell ballistic battery. I am experimenting with the expanded metal side panels. Not sure how I feel about these...these were just quick and dirty cuts so I could see how it would look. I"m not sure if i like the look or not yet...but if I go with it, I'll use stainless and one that the holes are smaller than this. I will also have to drill into the frame to make mounting bosses, which is no big deal, since the whole thing will come apart to be powdercoated at some point. Lastly, you can see the fender and tail light. I need to fab some additional mounting points on the frame to securely hold the fender in place. Right now I just ahve two small top mount bolts holding it but I don't think that will hold the heavy billet tail light bolted to the back over time.
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    This is gonna be one hell of a bike once finished. After some thought, I really like the idea of something there in the hollow area (so long as you move it behind the frame members) . Hollow-mode cafe's are so common such that some sort of differentiation is appreciated, at least by me. I think once you find the right pattern and finish for those sheets it will really look good. Also a logo like you mentioned is another good idea for unique aesthetic.

    Here's the oem style covers should you decide to go that way.

    Honda CB125 CB125S CD125S CB 125 S 76-82 Blue Side Cover Panel Left & Right NEW | eBay

    A really bummer on the caliper tho, suppose you'll have to settle for a crab up front. There are no 2-pot floating calipers in that gold color like your rear. But let me know if you do decide to space off the front disc.

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