I'm looking to buy a Honda GX25 or Honda GX35, but has anyone ever used a Briggs and Stratton 800 series (2.9L qt gas tank) engine or 550 series (2.0qt gas tank). The briggs and stratton are classified as "other engines" but can be used for multiple uses such as lawn mower, edger, whatnot. I'm only looking into a 4 stroke engine without mixing the oil and gas, and I really want the engine on the back of the bike. Let me know what you guys think.