how much difference is there between the different i4 's that the motorcycle companies are making? the only thing i can really go by is race results, i watched a few last summer ,suzuki had the 1L class wrapped up and yamaha the ss 600's,but for all i know it's probabely just rider talent,it was such total domination in their respective classes it almost looked like a noncompete agreement if race results sell bikes suzuki sells 1000's and yamaha sells 600's.Well i've also heard that suzuki has a better traction control system so they can make more speed into the straights with their 1000's and yamahas weight dist is more front end for cornering so their 600's win the corners,does any of this really make a bit of difference. i think if they made a purpose built sv 800, not a bore out,an engine ment to be an 800 with no fraility issues,in a small light 650 sized package, economical ,so the people who are concerned with performance could still do the performance upgrades,maybe make it so gixxer parts bolt right on. that might be a good marketing strategy