horsepower

This ole retread's been away from 2-strokes fer decades. I need a primer on a state-of-the-art bicycle two stroke motor. Searches revealed - lotsa hi-perf mods; carbs, pipes, DIY porting etc. Not much yet on the current crop of Out-of-Tha-Box Hi-Performance bike motors. I'm a bit rusty...

Does anyone know the actual hp of the F50 and F80 engines? The KTMC 49CC is 9 hp, but i don't know how accurate that is. BikeBerry claims that its cheapest 66/80 cc engine is 5-6 hp. But that seems kind of high considering it is 7/25th the cost yet 2/3rds the hp of the KTMC.