Contemplating a two stroke engine transplant in to former four stroke machine that has a right side countershaft and thus right side chain drive. Looking for suitable 2T motorcycle engines, either singles or multiple cylinder, that are right side drive. Trying to keep cost reasonable so anything exotic or current may not be the best option. Been looking at air cooled vintage stuff but older liquid cooled stuff could be a consideration as well. Rotax/Bombardier, Husqvarna and Ossa are the few I know off hand. Pleas enlighten me to any that you are aware of. Muchos GrassyAss!