RE: GP Ultimate Bipe and engine size?
Hey cruisemissle:
How did the GP ULTIMATE 40 fly with the magnum 91 4 stroke?
My Dad is building me one this winter and I have an OS91FSII looking for a home.
Since I don't think I can squeeze the pitss muffler and a 61fx under the hood I really am interested in how the 91 4 stroke worked out.
Thanks
Eric