briggs would be a nice little engine maybe for a cat or something. you may have to gear the bike down little so it will take off good for you? that will depend on how much you weigh? you did say your going to run it on flat ground. that should help make it easyer to ride:thumbsup:
need to find a 3.5 or 4hp tecumseh with a front mount steel gas tank..........:thumbsup:
now where did i see some of them in my garage.....:shrug:sorry not for sale,,,,:doah:
http://www.oldminibikes.com/forum/strictly-us-vintage/34413-bonanza-bike.html