MIght I be too tall???

I would like to buy one one these bikes: Ducati 999 or the Ducati 848 or maybe a bmw k1200r. I'm 6'2 . Might I be too tall for these bikes? Do you think I might have a problem with my legs, knees?? I'm going to go try them on anyway. When is someone considered too tall for a sportbike??

I'm about your height, and my brother is about 6'4''. Neither of us have had any problems with any reasonable bike (ie, not a 250)

Not sure about the 999 or 848, but I'm 6'3 and had a 916 a few years back which I rode to the Bol when it was at Paul Ricard ( From Leicestershire ) I have also had a Kawasaki ZXR750L1&a ZX7R both of which I have toured Europe on without problems, I currently ride a Yamaha 2002/3 YZFR1 which is as comfortable as anything else I've had, so I would say if you like it and it feels OK go for it.