I'd buy a lightweight 4 stroke - a few years after they come out & aftermarket parts are available.:sneaky: Mostly big bore kits, as otherwise there won't be as much power increase available to us as on a 2 stroke.
In the meantime, there's no substitute for the catapult feeling of a big bore 61X coming on the pipe...:woot: :woot: :woot: :woot: :woot: :woot: