I bough a 2007 650r 6 months ago did some mods (sport bars, arrow slip on & fe) I've ridding so fAr so good till i rode my buddy Zx1R damn i luv the bike runs smoother and powerfull than mine ! I'm paying mine i still have 6 more payments my question is should change it for a 600 or go 4 1000 ! It will be good idea I'm pAying anyways what i don't want it's upgrade anymore an stick with one for longer time! Nothing bad with my 650R just feel like a can handle more power! And i like a biger bike!