Ride for any length of time on a m/c is far, far different to driving a cage for said difference. Loose a bit of concentration while riding & you will end up being in the hospital.
One can only gamble on going so long above the speed limit without speeding tickets or just a few in the run NOT to mention accidents at said speeds & not being familiar with the different hwys.
Thing is to try 4 hrs of constant riding along with fuel stop & filling up & by then many, new to m/cing will be pooped. Some of us can clock 6 to 8 hrs on a bike, but even then we are tired at the end AND the big thing is we are familiar with the bikes we are riding & hardened up to that pounding of the wind, possibly rain, having to stop to clear full face helmet visor of bugs, etc.
I would say the Suzy SV-650 but without riding it for some 4 to 6 hrs a NUMBER of times ----- well things can be sort of touch & go.
I remember some chap that was going to do a similiar run & his experience was quite limited. In fact he had the crazy idea of riding one direction ine the one bike he was familiar with, to dump it off to a friend that wanted to buy it & ride back on his newer bike.
Fortunately he obtained a lift by someone with a cage to pick up his new bike. He was so tired from being a PASSENGER in a cage that the very idea of riding the bike back was cancelled & he had it shipped & went back on a bus.
Oh & his 'used' bike was sold locally rather then having it shipped for the bike shipped to him was damaged a fair amount.
Thing is your life worth the gamble on such an idea that you have in mind?