exactly.
i have absolutely no faith in anybody who cannot get a stock moped engine to run right, to do a proper job of getting a lifan on there without it coming unglued. is it really a 'good deal' to do all that work, spend 200-300 bucks, and end up with a shitty chineese engine which breaks off its motor mounts and is roughly comparable to a 400 dollar, reliable, e-50 setup?
If you're all hot-shit pro and want to do this as a challenge, go for it, but if you cant keep a stock moped engine together, you have some learning to do before trying crazy shit.