Jetting issue.

Jun 25, 2000
I have a jetting problem with my other toy. It doesnt want to rev as much as i want, its sounds a little like when its cold and you try to rev it. But it doesnt smoke almost anything at all and the plug is grey at the tip and black on the sides. Opening the choke doesnt change the engine much so i cant tell if lean or rich buy that either.

The bike came with 158 main when i bought it but i think its been running lean cause the tube inside the silencer had burned holes and the packing had pretty much burned up. Now im running 190 and it felt a little better than 178 but i cant tell really cause i changed the pilot at the same time cause it was running rich on the lowend.

What should i believe in, plug color, smoke or engine feel?