Not knocking anybodies build or opinions, but I'm going to share me experience. I have a friction drive kit from BMP. No issues what so ever with it. I have had a Huasheng 50cc engine (2 stroke) fom a Harbor freight auger, the same engine from a Harbor Freight water pump and a Honda GX35 (4 stroke). No issues with any of the engines. Depending on who you want to believe, the Huasheng engine is rated anywhere between 1.5 and 2.2 horse power. I have no experience with any other 50cc engines to compare it to, but I do know it has a lot more power than the Honda GX35 which is rated at 1.6 horsepower. I'm currently using my Huasheng 50cc engine because of the extra power. The Honda would probably out last the Chineese engine by a long shot with way fewer problems, and I can also buy 2 Huasheng engines for what 1 Honda cost. I guess it all depends on what you want and/or can afford. I bet I'm the only kid in my neighborhood with a cheap Harbor Freight auger with a genuine Honda engine on it as well !