Mikuni TMX needle jet question

dirthead78
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dirthead78
Was hoping someone could help me with a question. 2017 KTM 150XCW Mikuni tmx 38 carb, is the needle jet removable and if so what is the best way to remove it. I have purchased an S-4 needle jet and can not get the old one out. Got me wondering if it is in fact removable. Thanks in advance. Doug
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dirthead78
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dirthead78 12/12/2018 7:28pm
12/12/2018 7:28pm
Thanks for that, I got it out, was just stuck in there.
AJ565
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AJ565 12/13/2018 6:11am
12/13/2018 6:11am
garagedog wrote:
How is s4 different?
The s4 flows more fuel down low vs. the stock s1.

Dirthead, are you cutting the slide to a 5.5 to go with the s4? Jetting issue? Try this

The Shop

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dirthead78
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dirthead78 12/13/2018 9:17am
12/13/2018 9:17am Edited Date/Time 12/13/2018 9:17am
To be perfectly honest, I saw a post on here from LanghamMx that referred to Factory KTM's jetting specs for the 150. So I thought I would try it.

30 pilot
470 Main jet
S-4 needle jet
42-71 needle 3rd clip
2-2.5 air screw

The bike currently has a Lectron on it, and runs good. Its Winter here in Southern Illinois and I'm just tinkering. But thanks for that link.

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