ORIGINAL: JoeAirPort
Nothing wrong with over-powering, you just have to live with the high wing loading as a trade off.
Not always true.... compare the weights of the engine, and put the largest and lightest you can on it.. some of the smaller 2 strokes weigh the same as a larger 4
Also, I seen a video of the katana with a YS63 and it was awesome... so mine is getting a saito .72!