I’m in the Middle East, temp is around 75F atm. I run 28mm pwks with a 155 main and 48 pilot, needle on the middle clip. I fouled a plug, all the time my plugs look black, and I get oil around my pipe so I feel like I’m rich. I run yamalube 40:1. Cos I was rich, I raised the needle clip and it got much worse, very piggy, so I put it back in the middle and it got better, so I think the needle(N68J) is fine.
i decided to drop the pilot jet down because the sweet spot was 5.5 turns out on the air screw, but no matter how much I adjusted the air screw on the 45 and 42 pilots, it would run horrible, like it would turn on for 5 seconds and in those 5 seconds there would be loud backfires from the exhaust and no consistency.
When I put the 48s back it would run alright for a bit but then it looses all power and bogs, when I turn the fuel off it runs well when I rev high but doesn’t last long, I am so confused