This bike is based on a 125 frame , the 125 was a very popular TY version in France as it was a road going Trial motorcycle , the frame had a lot of extra weight because it carried lots of extra lugs and brackets to take all the street bike rubbish like indicators , ignition switches ,battery etc unlike the much lighter competition version that the TY175 was/is . Here is some inspiration if you want to take ownership further. https://youtu.be/b2fMtHB2bv0?si=EsqKQCv7u5ZNV