LESSOR2,

Good lookin' Cub you got there.... If you are dead set on a 4 Stroker, I think the Saito 125 would be perfect. I have a Sig 1/4 Scale full span Cub, that is probably like yours, a little on the heavy side, and I have as OS 120 in mine. The 120 flys the plane with authority, and I rarely hammer the throttle, except when doing loops or inverted flight. I have been hearing great things about Zenoah's little 20c., and you might go that route. If your Cub was like mine, it needed a little weight up front, so a small gasser can help in that area. What is yours covered with, it looks like fabric? Coverite maybe, or solartex....??? Anyway, 'ya gotta love them Cubs, and every one needs at least one Cub in the hanger.