Hi everyone I am about to buy a motor. I'm just a poser now haha. I was wondering what the differences are between the 2 stroke motors (besides displacement). I noticed there are newer ones that are EPA approved and have catalitic converters and needle bearings. Does anyone know if the old style exhaust flows better then the cat ones? Price is also a big concern for me. I just want the most bang for my buck speed wise. Any info is greatly appreciated.