A std NSR is rich anyway purely for safety reasons, Honda can't sell a roadbike you can't use in the cold!
You'll never really tune the hesitation around 6-8k out just faffing around with the needle with otherwise std jetting as the std needle is effectively a B needle on the leanest setting anyway.
Putting the HRC needles in without the HRC emulsion tubes is asking to get a needle jammed in a mj and the HRC needle holders are better too.
A '21 has the timing is tailed off in the higher gears (see here for how to sort it).

I'm presuming this is your '21 in '28 clothes?
If so you need to get the main right for the pipes having done both wiresplices and maybe opened up the airbox a bit before you worry about cleaning up part throttle midrange splutters.
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