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Got it, thanks for all the help. I don't plan on getting it absolutely dialed in for the winter as I don't do much winter riding but I'll play with Airscrew/PJ. excited for riding season however. guess I get a little eager haha.

First test with new plug, ran up and down the street. Doesn't die anymore runs. However at a low rpm if I pin it it bogs down signature lean bog, this is like fro near idle and and putting it around i first then pin it bogs. Would this be air screw adjustment, needle, or incorrectly ground slide. Jetting is...

I honestly figured. Before I made all the carb changes, in its stock form it was doing the same thing in the very cold temps but I brushed it off as poor jetting for the weather. I just ordered a new plug. Ill update once I install it. On a side note, how do these settings look as a starting...

Hey all, after grinding my slide to a #5 as per diggers pictures and help, I got my needles as well and ran the bike (2020 ktm 150sx). I ran it with: 520 main 35 PJ 43-74 needle clip 2 #5 slide (ground 1mm from #4) Outside temp: -4° C (25° F) The bike started first kick and idled fine...

Yup thats what I did ground up to that edge. Thanks for the help guys it looks like it turned out not too bad and am just waiting for needles now. Hope to test it soon.

How does this look now that it's ground down and smoothed with cartridge.

Ok thanks for the reply, my very close family friend is a machienest so im having him do it today after work. Ill follow the procedure outlined by others in this thread so hopefully all will go well. Probably will take of a hair under 1mm to play it safe, test then readjust if needed.

Also posted this in main thread because I need an answer rather soon, do I or do I not grind this highlighted portion of the slide to go from #4 to #5. My understanding is i don't touch this part and grind the out arch up to this point. However looks like this person did grind it.

Just as a confirmation as I will be grinding my slide to a #5 from a #4 i do not grind the highlighted portion in the image below, I blend up to that portion correct? (The image used is from someone else in the thread and it looks like they actually did grind this part?)

Interesting, and thank you for taking your time to measure! Just curious however that previous messages all said take 1mm off to get from a 4 to a 5. Im assuming your measurements are closer to what it should be?

If you could measure the width that would be great!

Yea ok I think I got it. The depth of the cutaway basically how far into the slide it goes stays the same, like it ends on the same edge just the outer arch gets grinder larger and blended. Like you said, top right of my Pic and bottom left

So I do remove material from the sides of the arch then. I saw in a previous message someone said not to make it wider though. Opinions on this?