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Quick update. I repacked the exhaust, put in a fresh plug and kept the 27.5 pilot. Ran it around for about 10 minutes and looks like I may be good. Here is what my plug looks like. At some point I was really rich based on how my piston looks. It looks washed.

Needle clip position 2. 40 :1 with 93 octane- aalways ran it this way with Yamalube premix oil I noticed it became richer when I notched the slide. It was rich down low before but got worse with the notch. Other than the pilot what would cause a rich condition. i thought the float was causing it but I lowered...

I need some help. I have a 2019 ktm 150 sx that seems to be running rich on pilot even woth a 27.5. The air screw is 3 turns out and it is at its crisp point. I'm nervous to go any lower on the pilot. I also have what seems to be sputtering / feels like I am hitting...

Digger, I was trying to find the post about the notch in the slide. I have a 2018 and a 2019 ktm 150 sx that I am preparing to file the slides notchs. What depth do I go to? I am currently running Slide #5 Main 490 Pilot 30- had a 35 but it was too rich and I have...