There is no way a NSR125 makes more power than an MC16. If it does then there is something wrong with the '16.

A stock MC16 will make around 45hp as shown here



The only things that hold the '16 back are the poor exhaust ports, crank cases internals and the 28mm carbs (the carbs dont holding them back that much mind). If those 3 things were delt with a '16 will produce around 58-60hp
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If I have to take the carbs off once more...