Goddamn! Normally when people on this site say “Am I too tall to fit on this bike” they are only 6’0 – 6’2″! Your height it definitely a challenge. I’m surprised that the GSXR feelt more comfortable for you, in my experience most 600’s are pretty damn cramped. In fact my 2001 Kawasaki ZX6R is LESS roomy than the 2008 Ninja 250.
I honestly haven’t heard of the ‘mode C’ that you are talking about, do you know how much it limits the bikes power?
Maybe try look at some of the dual sport bikes like the DRZ 400, they are pretty tall and might be more comfy for you. Also check out the SV650, that is a really tall bike in my opinion.
~Best Beginner Motorcycles Admin