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Thank you for your input. I have new parts on order and will continue testing.

2022 125SX MJ 540 PJ 32.5 AS 1.50 slide 5.0 from JD Jetting Needle 42-74 on the 3rd clip (Yamaha 284-14116-H4-00) Needle jet S4 (KTM part #55431021400) PV 1.5 turns in from all the way out. Fuel mix 91pump/U4.4 2:1 Motorex 36:1 Warning the bike will run very fast on this jet and fuel mix but will run hot. just...

Im running the same set up as you from page 1. just move the needle up to #3 worked on mine for both my 250 and 125 they both responded well too the change on the AVgas, and is also working well with 2:1 91 Pump/ U4.4 36:1 Motorex

2022 250sx FMF pipe and silencer MJ 490 PJ 32.5 AS 1.75 slide 5.75 from JD Jetting Needle 43-75 on the 2nd clip Needle jet S4 (KTM part #55431021400) PV 2.25 turns in from all the way out. Fuel mix 36:1 Motorex 2:1 91 pump gas/100LL av gas Bike is slightly lean its seems on the top and a high...