I have a full Akro system and Ivan's jet kit with modded air box and stock filter. Runs great, no hesitations no dips in the power delivery and I usually get around 40 mpg. Several years ago I had it dynoed with a sniffer and the mixture was just about perfect through out the rev range. The only mods since then are a ZX1D ignition box, stick coils and dual valve springs. Having said that last weekend while riding with friends I decided to show off a bit. I nailed it in second gear. I passed one of my buddies wfo in excess of 7000 rpm. When we stopped for a break he tells me that he got a whiff of raw gas when I passed. Well what do ya think?