This. Big bikes are as fun as it gets in cheap teleporting. Smaller bikes fun at everything elseI would say it depends on the track or road. An R3 will never "keep up" on open freeways. You cruise at 80? Cool. The bigger bikes will walk you past 80 to 120 and still have about 30-60 mph to go before they max out, maybe more. On tighter roads, like some sections of Palomar, there is hardly any use for anything past 2nd on a 600+, and the nimble little bikes will keep up with them. Same applies to the track and time and time again, you will see the big bikes walk smaller ones in the straights and then get passed in the corners.