The Stuff Dreams Are Made Of... RZ500/R6 Hybrid.

You hear about bikes like this in lots of conversations.... "wouldn't it be cool to put engine X in chassis Y"..  Well someone REALLY did it.  More on the project over on BARF

"Current generation Yamaha R6 chassis with Ohlins forks and shock, Brembo brakes, forged wheels, and aluminum subframe. Engine swap with Yamaha RD500 (aka RZ500 aka RZv500) V4 twin-crank two-stroke. Handmade expansion chambers with carbon fiber silencers. Mikuni flatslide carbs."