my buddy has a r and it just not running right, we took it up to little sahara and got the jetting right by the dyno standarts its got a 64mm bore with a stroker crank, ported and polished fmf pipe open lid k*n v force reeds and the thing seems to be running out of fuel on top end like its starving. The needle and seat could be the trouble but im no 2 stroker, he put a direct dump valve in the gas line so its feeding non stop and that helped him alot gave him some bottom end that he never had. he just doesn know why it isnt running good its like when u get to real high rpms it starts to spudder and it loses power

before the over haul it ran good so i know how it is supposed to feel. can u help?