All of the engines mentioned above are made by Golden Lion (SH, XTM, LRP, Mach, etc.). The LRP and SH lines are some serious powerhouses for thier costs, and though they might have some problems here and there, they are defntely better than almost all other cheap chinese engines.

These Golden Lion engines I actually mid-grade. OS I would consider mid to high grade, and the Rossis (NovaRossi, GRP, Sirio, etc.) I would consider top of the line. Though SH and allother Goldn Lion engines are not as good as these engines, they are actually not bad for their price.