Finally finished the conversion. I thought I shold post some tips if anyone else planned to do this to their engines.I used calipers to precisely measure the drive crank taper. I found Tal-Ko Racing that makes direct drive parts for the TKM BT82 engines which is a 99% match the taper on the Sonik TX125 engine. They are in Great Britain so I had to pay $30USD in shipping, but I ordered tools and spare sprocket too. Here is the link to the videos sorry in advance about the cameraman skills and the audio is a little off. https://drive.google.com/drive/folders/1xt7PVgqllRqWtYImQ5EbfbytJaSA5Qg1?usp=sharing