It's a well known fact that the shipment of motorcycles across the ocean to the United States causes a phenomonen know as Salt Waterosis. This results in said motorcycle gaining several pounds over what the Manufactuer says it weighs and losing several HP over what they claim.
It's also a given that the high concentrations on Nitrous in the UK air make British Bikes faster.
I have yet to encounter the 200MPH stock Busa, much less 190mph.
You know I thought all Busa's ran 200mph until I tried it. My stock '04 with slip ons ran 178MPH.
With Full Brock's system, P.A.I.R. block off's, small airbox mod, Better ram air tube seals, Power Commander, synthetic oil, running fuel and I weigh 110lbs I've run a best of 192MPH in the standing mile. Now it would probably run faster with an unlimited length to top it out but the mile certificate is what I have.
The accepted # I hear the most is 200HP= 200MPH.
I think my first Dyno run showed 154WHP I ran 182mph with that setup. Believe me it's alot harder than just adding a few mods and going 210MPH.
My advice to you is if you want to go that fast get involved with one of the LSR events Texas Mile. Loring, Maxton, ElMirage, Bonneville whatever the UK has, prep your bike enter and see what you REALLY can do, NOT what you think. Then get involved in some of the LSR boards and get some help from people who are out there doing these kinds of speeds.
It's pretty easy to run 180MPH but from there every MPH comes at a price. I've been on the phone with my Sponsors for a year on and off just to get that 192mph certificate. Do some research on LSR on the Busa Boards and you'll find a wealth of knowledge and a ton of people willing to help you out. I would have never gotten this far without board members help!
Marie