Ive owned and used all year round a 2002 gsxr 750 for a few years back in the mid 2000's admittedly that model is not as slim as the k6/7 or as powerful, however even the k2 model when compared to the Fazer is a different world, u are more stretched out, higher pegs etc, not as comfy but still usable imo ( I'm just under 6ft, around 205lbs) Spec wise it's like night and day, I believe around 145bhp, 164kg dry weight, far far better brakes, handling, equipment, power etc etc... Basically it will rip ur arms off a bit compared to the fazer for a while before u adjust, but not as comfy/practical or rattly lol