I did 480 in the course of a day last summer on my Magna 500cc. I don't remember how long it took and certainly didn't record anything. That was on a 24 year old original seat, which admittedly was more comfy than the stock Max.
So far the farthest I've done in a day on the Max was a bit over 400. Ass was definitely getting a little sore by the end.
Have to try for that this summer.
Holy crap! Coast to coast in 48 hours! Assuming a 3000 mile run, that means you'd have to maintain 63mph for 48 hours straight to make it. So to account for even just the bare minimum gas/piss/candybar stops, you'd HAVE to exceed legal speed limits by quite a bit, for quite a while. Now THAT's hardcore. Harley's need not apply for that one. They'd never make it having to stop to add oil that's leaked out and pick up pieces that fall off!:rofl_200:
Compared to the 1500 in 36, that's 100% more mileage in only 33% more time. The 500/12, 1000/24, and 1500/36 all average out to about 42mph for the entire time.
You should request a different certificate...you don't ride no stinkin' narrow-angle V-twin!