NSR's dont have bleeders on the cylinders like the Honda RS (or the KTM it sounds like).

Without the bleeders, I would fill up the radiator, squeeze the hoses, tilt the bike approx 45 degrees to each side, refill, repeat till the level in the radiator doesn't go down anymore.

I do this same process with my RS with the exception of bleeding water pump, cylinders and head using the bleeder/purge bolts.