The FS200P doesn't put out anywhere near the power of a YS 1.60 or 1.70 as it is not supercharged. Only the EFI version of the FS200 is supercharged. I have an Osmose EVO, and rarely go over 3/4 throttle with my 1.70, and will do unlimited vertical at about 60% power, with an APC 18.1x10W on 30% nitro. It is a little over 4900 g. A YS 1.60 would be plenty of power.