My bike has a 150/60 on MC21 Magtek. It's almost impossible to get rid of the chicken strips street riding. Maybe on the track it'd be better. I've even scuffed my right fairing on the street before(dip in bend), thats how I'm pushing it.

Think about this though. I have an FZR 400, they run a 140/60? in the rear. When I got it it had a 160/60 on it. Needless to say the handling was "wierd". The next tire I bought was a 150/70, that kept the proper roundness on the kinda narrow rim. After that you could use the whole tire. The bike also tipped in way smoother..... Well, until it got it's 600 power plant

I wouldn't go above the 150/60 to be honest... Or at least go with a taller sidewall if you do. I've delt with it before and it wouldn't be worth ruining the handling of the NSR just to have the wide tire look.
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MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600