How to Jet a Dirt Bike Carburetor - Jetting and Needles

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This video is about How to Jet a Dirtbike carburetor. We'll discuss Jets and Needles and how that effects the performance of the bike. We'll cover the tools you need to complete this project and give you the confidence you need to do this yourself.

Jetting your carburetor isn't hard. It's not voodoo magic or anything like that. Once you take your carb apart, and see how it works, you will be more confident. Take your time and order a few jets for your bike based on the manual's jetting chart. Use some common sense and ask around about what others are doing.

I live at about 5000' above sea level and can get my bikes to run good at my house and they still run fine up to 10,000 feet. Yes, they run a bit rich up there, but it's not a huge issue. Once I get my bike dialed in, I pretty much leave it there for the rest of the time unless we go ride at a much lower elevation, requiring me to enriched the fuel mixture.

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[b.steffens]

The most I've learned from a video in a long time..great filming, great explanations, and your terminology such as "little white plastic thing" and "this thing, I don't know what it's called" is my kind of language. I now know exactly what to do and how to do it, and I'll definitley be subscribing. Keep up the great work, ride hard, and be safe!!

[Torturekiller]

I never wanted to touch the carb just cause I had no idea what to do. That video was great, I will definitely save some money by doing this myself. Cheers. Keep the great vids coming.

[jaydenbrockington]

“Until we get EFI on these bikes, which we probably won’t” aged like milk, but I’m glad :)

[kinotroikgames]

I love how easy you make that look and you explain it real well! I feel pretty confident my 2 stroke will be fine thanks to you lol

[lauraschlenker]

I just wanted to say thanks for this video, I re jetted my new 2o17cxw today. First time I've ever done this and your video gave me the confidence to do it!! And it turned out great, runs alot better.

[Roller]

Great personality and attitude. No-one started with a works sponsored mechanic when I was picking up riding in the middle of Australia. It was mates who rode alongside you, laughed with you and enjoyed doing the same things some crazy yank is doing on YouTube. Some of those thingeys and whatsit's do have names. Needles sit in "seats", the nut retainer thing. Remove the throttle assembly (needle bit) first before attempting the bowl. This allows greater leverage without bending needle, allows for straighter jet removal and replacement (cross thredding at your angle with straight tool). Plastic guide on bottom of spring is set snug in spring for a reason, retension and extension of spring is measured for true length of a spring. Not seating the spring at its propper length can cause obstruction and bunching.
Your blogging is inspiring for me and my 4yr old son. Educational and addictive. Thankyou

[TheSoren]

I watched a dozen videos on carbs and it all sounded like Chinese to me. Watched your video and it all clicked. Thank you, your a natural instructor.

[lamby]

THANK YOU! Saved me taking it to the store and wasting money, was actually enjoy-able learning this for myself.

[glennhall]

Hey broski. Quality video. When searching for diy videos there's a lot of garbage, and then there's good ones like yours. Always grateful to the individuals who can pull it off God bless

[brianb.]

Great video. I would not have attempted installing a new jet and needle without a video like this. Cheers and keep the videos coming!

[garydauksch]

I thought that dog barking was outside my house. Then I saw your comment and I busted out laughing! Great trick with the spring too! Thanks!

[dylangrieveable]

Thanks for making this Kyle; just bought a KTM 300XC, and this helped a lot, especially the trick you used for re-installing the spring!

[jessejarzabski]

i must say the single most important lesson this vid demonstrates is the spring trick on the slide....that is golden to a newbie and once you do all this and reassemble and bike fires right up...the confidence boost that inspires is priceless and wiill give u more confidence in future tuning sessions. but on the spring method ...until i learned that.. i would feed cable on the bottom of slide and lock it in ONLY AFTER i had put the spring on and as id compress the spring..id hold it in the most compressed position and then use a pair of small vise grips to clamp on the wire right below the spring so it stays in the position it needed to get cable end into groove and seated right..then id pop off the vise grips and slide her in the carb housing... its really frustrating and on average that step took me around 45 mintes of trial and error before i got it locked in correctly and was the single most difficult step for me to complete....so with the spring twist on method....the hole process will go light years faster!!!!

[woodworm]

That little cup at the bottom of spring! Gotta watch that tongue inside of boot. REAL IMPORTANT! Your video with the cup up on the throttle wire FIRST and slide the cup down in SLIDE with the tongue inside of keeper is important. The spring trick was dead on. THANK YOU. Without that trick the cup is a 50/50 of seating correctly. Glad I saw this much earlier. Saved me time and tooling issues. Light at the end of the tunnel was quick.

[robertoperfecto]

thank you for posting the most easy to follow ie clear vision, audio and instructions, video on 2 stroke carbs.

[motoj]

This video helped me so much in tuning my carb on my 250sx! Thank you 100 times over and keep up the awesome videos!

[KingJamesVL]

Damnit why haven't I thought of that spring trick before... I've shot countless springs across the garage trying to get them on lmao

[TRUCKER_TRUCKER]

Thank you so much!!! you make this stuff so easy!!! been following your channel for awhile now and you have saved me so many headaches!! keep it up bro!!

[haroldgotsch]

Very informative. Especially to me, a beginner. It made the carb operating process understandable. Thanks.

[NewEra]

Damn... i feel like an idiot for struggling with those springs for the past 15 years hahah. Never thought about putting it back like that.
Great video!