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nextgenMX Added a reply to R304 or 304 2020 KTM 150SX
5/12/2026 6:53pm What do you recomend as the powervalve setting. Also im leaning towards the shorty as in my area we dont have large tracks persay and I mostly ride in the woods as well on some trails and small tracks.
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nextgenMX Added a reply to R304 or 304 2020 KTM 150SX
5/12/2026 6:37pm Ah I see, so if I choose a shorty, would I be able to compensate with it by using the powervalve screw?
nextgenMX Added a reply to R304 or 304 2020 KTM 150SX
5/12/2026 5:37am Was the rpm difference very noticeable? Also I live in canada, would you be able to ship here if you can cut me a deal?
nextgenMX Added a reply to R304 or 304 2020 KTM 150SX
5/11/2026 1:00pm Did you notice a sacrifice on the top end at all? Also do you recomend it haha.
nextgenMX Started a new thread R304 or 304 2020 KTM 150SX
5/11/2026 10:33am Hey all, ive got a 2020 ktm 150sx and am looking at some aftermarket silencers, mostly because of the sound and looks but I am curious about the performance. Between the r304 and the 304, is there a major difference between the 2 and compared to stock in terms of power band, peak horsepower, ect? Also is there a difference...
This forum thread has 13 replies.
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
12/13/2025 11:09am 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.
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
12/12/2025 3:45pm 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...
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
12/11/2025 7:09pm 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...
nextgenMX Added a reply to 125/150/250/300 KTM/HUS/GG jetting thread
12/11/2025 5:08pm 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...
nextgenMX Added a reply to soda blasting entire dirtbike engine
12/6/2025 12:20pm I appreciate your opinion and experience and am definitely second guessing doing it, just wondering what are some other entry point where it could possibly enter from other than the ones I mentioned? I might just test it on a small area first to see if it's even worth it or not
nextgenMX Added a reply to soda blasting entire dirtbike engine
12/6/2025 9:17am Im not sure how it can get in there with the sealing off i did. I pulled clitch cover off and make a acrylic block off plate with a gasket and grease. Intake opening and exhaust have a first layer of thick waterproof tape, then many layers of duct tape, then zip lock zip tied onto it and then more...
nextgenMX Added a reply to soda blasting entire dirtbike engine
12/6/2025 7:04am What do you flush the bottom end with, gas?
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?
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?