Having owned and ridden a well sorted nsr mc21 with approx. 62 bhp, and also a 92 nf5 with 82 bhp { Honda stated }, and also being of a certain age and riding ability, I can categoricly say that the nsr, for me is much easier to ride, I can ride the nsr flat out , to my ability, but if I were to try and ride the nf5 the same I would end up in trouble. The nf5 may have better handling, but as a pure out and out racer I find the ride way too hard for my liking, and overall much too focused with its narrower power band, one is like riding in an armchair and the other is like riding on a plank of wood. So I stick to the nsr and let my son ride the rs, he is an ex racer with two stroke experience, and like he says to me, DAD, its a proper gp bike not a modified road bike. So I would say if you can get your nsr up around the 60 bhp mark, and you are a medium trackday rider stick with the nsr, but if you are a realy accomplished rider and feel you can handle the extra power go for the rs. A word of warning, if you plan on racing the rs or doing a lot of trackdays, beware, consumables like all your top end stuff is near extinct, as are barrels and cranks. Hope this helps Les.
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Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto