Hey everybody. So I´ve been the prowd owner of this bike for about six months now and I finally started to toy with it a bit. My ultimate question though to cut to the chase... is first do the 400 and the 750 have the same frame? If not... what other type of larger motor could I put on the bike? In regards to exhaust... what would the effects be both performance and sound wise if we hollowed out both pipes? Or simply just cut them at the welds joining the first and second halves.