now has 172 main 45 pilot NJES needle 3rd clip from bottom Adjusted needle, 2nd clip from bottom it was rich and sputtered ( or how ever its spelled) 3rd clip from bottom was ok. Just thinking I'm missing some power at mid range so is it ok to go one clip leaner? How I can notice its too lean? And which way is good to find correct main jet. Had 178, then 175 and now the 172. No much difference. Even with 178 ran clean at full throttle. Well the plug reading worked well with smoker but I feel like it doesnt make the best results with 4 stroke.