DT50X Engine Swap & Build



  • Heyo Guys!
    Daniel from DAN RACING here

    I bought this bike december 2017 like this, it almost didn't run and it was in pretty bad shape.
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    Up to now, I got it like this

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    It goes to 140km/h GPS speed power wheelies in 1st and second, clutch wheelies until 5th , nothing is left stock, everything is made to get everything out of the little 86cc.

    But I wanted more, Something with more torque, with low end power and everything, I decided to do an engine swap.
    I will be fully building a DT125R engine. Updates with more pictures coming soon 😉

    YOU CAN ALSO CHECK OUT THE BUILD IN MY YOUTUBE CHANNEL: https://www.youtube.com/c/DannyTVDANRACING



  • Yeah that's savage! Lovely looking machine.



  • Nice! keep us updated. will be a fast and light bike for sure 😛



  • @DanRacing A very interesting build, I'll look forwards to more updates. 👍🏻



  • Tpr 86cc? Had one of those as a moped 2 years ago!



  • Started cutting the frame today, the 'half moon' on the side of the frame are so the clutch case clears up and i can remove it without removing the whole engine, I will still weld something there to fill up the gap and reinforce it. ALso cut the front mounts off. Will be welding new ones
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    First look the engine inside there, nothing welded or stuck, it's just a mockup engine, not the one that will be put in of course 🤣 🤣

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    @Irongamer727 Yup, TPR86 kit 😉



  • @DanRacing You definitely want to run a DTR Engine yeah?

    I know you guys are mental for tuning, but you could just use a better engine. If you're going to all this effort.

    Rotax Engine, KTM Engine....



  • @Calum In here we make the DTR engine one of the best out there 😉 And i'll be running a 65mm bore with stroker crank by the way 🙂



  • @DanRacing this is exciting I wanted to do this swap as I have both bikes but never would use it



  • Got around to building the front mounts, trying to get the motor lined up was the hardest.

    I'm not a welder or anything close, so don't mind the bad weld looks, they seem strong, will try and reinforce them even more tomorrow.
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    The motor is finally sitting by itself, again everything is a mockup still, will build the engine when i get the frame done to avoid any metal shards

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  • Ok boys I wasn't happy how the old engine mounts looked, so i went ahead and did stuff right
    (Getting my driving license for cars also helped me move around and get more parts and stuff)

    I ordered a machining shop to make me some bushings for the swingarm mount on the engine so it all lines up good without any play.
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    I cut off my previously made engine mounts, fabricated new ones and tached them in place. Tried to line up the engine the best i could on center with the frame.

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    Engine looks pretty lined up.

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    Going to check everything after dinner and finish the welds for the mounts



  • @DanRacing looks a sweet build, I can imagine the DT engine to be perfect for a light frame like a 50cc, nice torque and good cruising



  • @Glynn123 This bike with all the supermotard wheels, suspension and frame is about the same weight as the DT125R, that's one of the reasons i went with the swap. Altought with the AM6 engine it was faster than a mostly stock DT125R it wasn't very good for City Riding with internal ignition and such.
    The frame is actually sturdier than a DT125R frame from what it seems, alot thicker steel and very big main frame.



  • @DanRacing I have a 2003 beta rr 50 supermotard and it weighs nothing compared to my DT haha, although the DT is allot nicer cruising engine