here is an update. i gave this a break due to heat wave and other projects around the house.i tried the other needles, didn't work. bogged down as soon as i gave a little twist. back to P-8, 2.5 slide to richen lower range, needle clip center. 1/4 range plug looked good. 1/2 range plug is clean, engine hot. moved clip down 1. plug still clean, engine hot. i got another baffle. same can opener style, 8' long, was 4'. 1/4 range stuttered a little. 1/2 range, still hot. changed to 3.0 slide to help lower range. moved clip down again, now lowest.stuttered a little in 1/4, didn't get a good reading. too much idle time. ran a 1/4 run, engine a little hot. exhaust ticted a little, but started back up OK. ran home in 1/2, plug is clean. exhaust ticted a little more. took a few kicks to start back up. FYI i quit using brand new plugs after the first 5. i am now brushing them of with a wire brush, till i get it close. so, basically, i am at the end what i can do with P-8. it still runs hot in 1/2. i haven't tried to test 3/4 or full cause theres no point if i cant get 1/4 and 1/2 to work. there is one other needle i can try. other than that, i am out of ideas again.
I'd go back to the settings at the beginning of this post and then take the bike to someone what has an exhaust gas analyzer and get more accurate readings. By the way, what main jet are you running again? With that jetting how does it idle, how does it pull off idle, and how does it cruise? Surging, hesitation, flat spots, etc? That's of more concern vs. what the plug looks like. Do you still have hair??
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