Can someone please! help me with my suzuki z250 jetting, i purchased the quadworks power up kit, installed the k&n air filter/prefilter, i am currently running the needle on the top position, main jet is a 115, but Im still getting rich results, low end is good, top end is good, 1/2 throttle is sputtering a bit, take the plug out and its running dark dark black, one little spot is a little brown.

I have been trying everything between the needle and just about put every jet in it, and i cannot get it to run right.