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nextgenMX Added a reply to soda blasting entire dirtbike engine
12/5/2025 6:51pm I've heard others say it's gentle enough and if holes are sealed it won't do damage, and won't get into the engine?
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nextgenMX Started a new thread soda blasting entire dirtbike engine
12/5/2025 5:37pm Hey guys i have my ktm 150sx motor out of the frame right now. I am planning on soda blasting it, if unfamiliar it involves using baking soda and an air compressor to blast the surface and get rid of discoloration, dirt, and grime. I have sealed off all the openings I know of, if you have any tips or...
This forum thread has 11 replies.
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
12/3/2025 5:55pm 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.
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
12/3/2025 1:39pm How does this look now that it's ground down and smoothed with cartridge.
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
12/3/2025 11:37am 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.
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
12/3/2025 8:59am 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.
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
12/3/2025 8:58am 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?)
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
12/1/2025 9:28am 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?
nextgenMX Added a reply to 2020 KTM 150SX carb swap PWK 38 or 38s
11/27/2025 5:34pm Yes I know the stic pwk is next level but that would be even more out of my budget. The most I would do is just a regular Ole pwk from keihin jetted for my bike. Stock for stock does the mikuni compare do you think? Also im hoping diggers specs get me pretty bang on which a lot of...
nextgenMX Added a reply to 2020 KTM 150SX carb swap PWK 38 or 38s
11/27/2025 7:46am Do you think I can get the mikuni running as good as a keihin with diggers spec and slide mod ect? I would like to not break the bank on a keihin unless I have to lol
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
11/27/2025 7:44am If you could measure the width that would be great!
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
11/26/2025 2:31pm 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
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
11/26/2025 11:06am 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?
Tuplavee Liked a reply to forum topic 125/150/250/300 KTM/HUS/GG jetting thread
11/26/2025 9:06am
0-30celsius I had the MJ always same, rich enough For spring and autumn one/two size bigger PJ and maybe one clip at the needle when it started to bog on throttle openings
This forum topic has 1232 replies.
nextgenMX Added a reply to 4.0 to 5.0 Mikuni slide (AJ/Digger/FGR thread spill over)
11/26/2025 7:13am Hi im also going to be grinding the #4 slide into my ktm 150sx to a #5. From the scribed line on the slide i see, did you keep it 1mm above the current arch all the way around? What i mean by that is Did you grind a 1mm offset off the entire arch or just the top. If...
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
11/26/2025 6:53am Thanks for the reply Just to clear some things up: In the pic you sent the slide on the left is a #4 and the left is a #5? Also regards to grinding let me know if my understanding is correct, I make a mark 7.6mm from a flat surface onto the front face, I thrn grind the peak of...
nextgenMX Added a reply to 125 vs 150 Questions
11/25/2025 1:16pm Hey I know this is a old thread but I recently got a 2020 ktm 150sx. Its got the mikuni and it has that signature stutter in the mid range. I will try to modify the slide to a #5 at home just so I don't break the bank besides if it doesnt work out I am looking to get...
nextgenMX Added a reply to 2020 KTM 150SX carb swap PWK 38 or 38s
11/25/2025 10:42am So is the 38s going to be the same as the 38?
nextgenMX Added a reply to 2020 KTM 150SX carb swap PWK 38 or 38s
11/25/2025 10:42am Is the manifold necessary? Also is it the 38s or just 38
nextgenMX Started a new thread 2020 KTM 150SX carb swap PWK 38 or 38s
11/25/2025 9:08am I have a 2020 ktm 150sx that has a mikuni tmx 38 right now. Im thinking to do a carb swap later down the line if I cannot get the Mikuni running ideal. The thing is there are 2 keihin pwk 38 on the market. One is a lot more expensive, the keihin pwk 38 airstryker ag short body at...
This forum thread has 13 replies.