Hi eduk,
Welcome to the forum.Personaly i woudnt use k&n cones on my strokers!! They mess **** carburation up & lead to a lot of time spent re-jettin.If its bn dun rite then ull b ok,if not then the motor will not b long for this world.There is an mc16 standard airbox & filter on ebay at the mo (in shops) only £15........i would get that & run stock jettin.
N.B. this is only my opinion.
As for it only revvin to 10k......dont no much bout the NSR's, but im runnin mc16 barrels & pistons on mc18 bottom end & its happy to rev wayyyy past 10k. Possible carbon build up on **** pv's stoppin them opening fully??? Cost u 2 x base gaskets & a few hours to fix.
Others will b of more help soon!!!
Anyway, all the best with your new toy!!!