World Superbike Racer
Join Date: Apr 2015
I Ride: 2015 30th anniversary ZX-6R
There have been riders on 'sportbikes' that have done it in the Iron Butt Rally, but their sportbikes are ZX-14s & Hayabusa, and the rare YFZ-R1s (esp. the 2002-2010s not carbbed - FI). I personally have not heard of anyone making the continental crossing in less than three days on a super sport sportbike. They carry x-tra gal. of petrol and use dual bladder bags on each leg.
With that said, I have done 900+ mile day on a '02 R1 & CBR 1000RR- twice. I have done numerous 12-hr riding days. I work up to riding long distance from hardly riding at all during the winter. I start with 250-mi/day over a weekend -if it is two days that would be 500-mi for the weekend. By Father's Day I'd be up to 350-mi/day. Rain or shine! One not only has to get their body acclimated to that kind of riding, but the real challenge is being mentally capable to pull things off.
Now, mind you, I funnelled fists full of dollars to modify my bikes to do this sort of thing. Fully adjustable rearsets, fully adjustable clip-ons, also the double bubble windscreen, custom saddle, etc. Then one has to pop for the radar detector, and GPS, and cell phone and the various sundry mounts and wiring up. Then there's the heated jacket; the hot weather under garments. I always packed at least 3-sets of gloves - they will get really grody if you wear the same pair day after day. And do not forget the Camelback with fruit juice/Gatorade, etc to keep dehydration at bay. I never resorted to bladder bags, but I rode with saddlebags and a tail pack on the pillion seat, but I never use a tank bag because it eats too much time at fuel ups! Yet I will admit to using a tank bag for weekend overnight excursions where the pace is a bit more leisurely.
So, as you might gather, for a soul such as mine, unless one is well versed in long distance trips, it's best not to jump on a OEM stock SS sportbike and do a transcontinental ride.
As a last bit of insight, I might offer: Do not do this with another rider that you have NOT literally rode together in varying conditions for multiple of thousands of miles! They will ultimately slow you down, if not force you to abandon your endeavour!