I bought a "Yamasaki" Honda CG125 copy in 2007 for my son as his first bike. It was cheap so if he broke it then there was not much lost.
Within a few weeks half the bolts holding the engine and the forks has worked loose cured with thread lock also the swingarm kept working loose. After about 4 months I found a crack in the swingarm pivot on one side and had to replace it ( £ 30.00 for a new one). Examination of the piece showed there was too much space between the swingarm and the frame cured with a washer on each side. Now it has over 10K on it and had to replace the rear shocks twice but nothing else has given any trouble. Its been dropped many times ( My daughter also learned to ride on it) used and abused looking a tatty but it is still going strong.