Originally Posted by Tyler6357
Wait, not all 2 stroke china girl engines are the same. It might have been true in the past but not anymore. Here are a couple videos for you to watch that explains some of the differences. I think the PX80s are better than the GT5s but that is just my opinion.
Also, that frame looks like a good start, it appears to be steel which is better for vibration and strength, get a front break for it.
I watched the videos, seems like great information on how to determine which engine you have if you're ordering parts. However I didn't take away anything from them that would help me determine which type is better and why.