RE: YS 1.40 Vs OS 1.60 Who got Power
OS 160 makes more power than the ys 140,
But YS 140 would be better overall engine because of wider power band and it is naturally pumped...Many people like having the fuel tank at the CG so that is a nice bonus...By the time you buy a muffler and a pump for the OS 160 its cost is about the same as a ys140