With two links removed from the chain, my 'Bus is about 57.9" long. The rear was raised when I had the shock re-valved and re-sprung. I had the fork re-valved and re-sprung with the 1.0 kilo fork springs. I lowered the front end 1/2" with a JCS handlebar mount. Street compound Rennsports with a 180/55 on the rear.
My bike is a lot lighter than stock. Marvic Penta II magnesium racing wheels, Sharkskinz bodywork, Muzzy full titanium exhaust, removed PAIR and counterbalancer, no rear pegs, all that stuff.
My biggest challenge (other than my lack of riding skill) is on the brakes. I turned my aftermarket sintered front brake pads to glass and turned my front rotors all blue and splotchy trying to haul it down from 190 indicated for turn 1 at Portland International Raceway. I learned trail-braking out of necessity. I also have the first set of -2 sized braided stainless front brake hoses that Goodridge ever made for a Hayabusa, and Motul 600F DOT 5.1 synthetic brake fluid. I now have a fresh set of EBC "kit" race HH pads, but I haven't had a chance to try it out on the track again.