Can this simple Jet Kit fix your bike?

The folks over at JD Jetting specialize in jetting (of course) and we try out a kit on a current KTM150 with the dreaded stock Mikuni Carb.

[@cbadnc9040]

The JD Jets did wonders for my son's 2004 cr125. Runs really strong now. Night and day difference.

[@Kevr.137]

Realy ?! I want same kit but it’s expensive in my country ,but now with your comment I WANT !

[@nagarenius]

I run a JD Jetting Kit on my TM EN 300 2Stroke. The Carburator is a Keihin PWK 38, did all the seals on the Carb and put the JD Kit in. Runs perfect since. >:) Great product i have to say, greets from Switzerland. :D Also check your Reed Valves, needed to change them too.

[@bpowa]

Jay, I am surprised you did not mention the block jet gasket issue. I turned my wheels jetting with the JD jet kit on my '18. I ended with a Keihin carb through JD and it came with the jet kit. I Could have saved 80 bucks on a JD jet kit for the Mikuni, and many hours trying every single jet and needle setting, with trail testing to never get it to run right.

[@orangerider2181]

I have an 18’ 300. So you’re saying just spend the money and go with the Keihin and the JD kit? Still on factory Mikuni….

[@johnharbinger4231]

The problem with most peoples carbs is the jet block gasket, which is beneath the tamper proof screws and does not come as part of any carb rebuild kit, it's only a nitrole rubber gasket/o rings in one piece, doesn't last forever, you can try and tune and re jet all you want, but if your jet block (mid body gasket) is screwed, then you are wasting your time, I know of two guys who decided their carbs were no good, and they paid huge money for lectron carbs, all that was wrong with their carbs was a $15 gasket for the jet block, I know....I bought their carbs and they were perefctly fine after a new gasket.

[@corkstarrr]

Can confirm this truth from experience (and a lot of hair pulling)

[@nickdefreitas]

That graphics kit looks sick

[@kineticsurf]

Would have loved to have seen the plug before and after.

[@dirtniron]

Great video Jay, JD definitely helps a lot. The bike sounds awesome!

[@JS-ny8sn]

This worked great on my 17 300 XC, I also put in a VForce 4 reed valve. I am doing the block jet gasket just to be safe. I love your content Jay👍.

[@Gregg0112]

The kit comes with a spacer ring. Did you use it?

[@JS-ny8sn]

@@Gregg0112 Spacer ring? I’m not sure what that is.

[@specializedbighitfsr]

@@JS-ny8sn the spacer ring is used when using the half clip washer. If you are not using the half clip washer then there is no need for the spacer ring.

[@woodworm3615]

I have the 19 ktm 300xc... Did the JD kit too. Yes was improvements. Block Seal, Red needle... fast forward to today....Still somethings up. Idle isn't droping correctly... Spoke to a Moto-God mechanic today. He says to get a 32.5 pilot. Have 30 pilot in now. Switch main jet to 410 from a 420. Im trying this when I get those two in. Otherwise Slavens has the NEW Mule Billetron Lectron coming in this month. Im willing to check this out.😉

[@JohnVanHolt]

Make sure that white plastic notch drops where it needs to. The cable unhooked quickly when I didnt.

[@SSRacing66]

Jay brings up a good point about the JD kits , If you go tuning with just your credit card, you can easily spend more than the cost of the kit ( 2 needles, 4 mains, 4 pilots would probably come close to $100), and still miss the mark. I've never tried one of these kits, but I have a couple riding buddies that use them and are satisfied.

[@pik2490]

Been dealing with the Mikuni for a while now on my yz125. Most simple carb I've seen. Easy to tune when you figure it out.

[@dirtbiketv1]

Yes pretty good to jet on a YZ125 usually

[@MP36BRAVO]

I bought the kit for my ‘19 ktm250sx. I did all the recommendations; 3rd clip, mj 430 pj32.5 and 1.5 air screw. It runs good but the spark plug is white(lean) still after a couple rides down the street.

[@jonasthomsen2578]

Move the clip 0.5 or 1 down

[@dancollins8453]

Done this on my 19 XC 300 with the JD jet kit and the JD block gasket kit and a bit of filing on the slide, It runs soo good!

[@dirtbiketv1]

Awesome

[@crjmoto]

Lectron was worth it for me due to the elevation changes here in CO. If in a flatter area, I'd recommend saving hundreds with a simple re-jet

[@TepcoCycleRepair]

You have to do the O-ring fix in the jet block on these carbs, any jetting is worthless unless you do that first. These carbs are awesome but come with a bad o-ring in the jet block from the factory. See my channel for the fix. Beautiful 125 in this video!

[@SANDS78]

Yep, pretty sad how bad they were new

[@TepcoCycleRepair]

@@SANDS78 Agreed, I repaired one with 8hrs on it because the O-ring was distorted from the factory.

[@SANDS78]

@@TepcoCycleRepair Mine was about 3hrs. I assume they had the tpi coming out and bought the cheapest carbs they could get, which I would guess we're a batch of old stock Mikuni's. The rubber looked like rubber off of one of my 30 year old bikes.

[@chrisvids1820]

I'm looking at a 2017 KTM250sx. Other than the carb issue is it a good bike? Parts available and reasonable? I'm used to my Kx250 but want to try a KTM

[@TepcoCycleRepair]

@@chrisvids1820 It's an awesome bike.

[@johnmccoy1887]

Jay you the man, JD kits in all my carburetor bikes since 2005 great company

[@Wide000]

Nice looking bike without the usual corporate stickers. With the gas all over and the scar , those hands certainly seem totally commited to work... ;) Great channel.

[@spencerclark2269]

Nice tip I will definitely buy a kit for my bike.

[@mestandard]

I have a JD kit for a Honda 250R and KDX 220. I’m a fan of those needles for sure!! Both run a lot better even after trying multiple PWK typical needles.

[@PeterParker-ot8pl]

All that info is in the manual... you get all the needles and jets in the kit that comes with the bag...

[@codenamenoob4973]

Just in time I'm looking into getting one of these kits for KTM 4 stroke to jet it for my FMF system

[@rcarle]

The JD kit is the way to go especially for guys like me that dont have the patience for the trial and error process that it would take with out it.

[@brokebikemtb4448]

Thanks to rado....I hit jd for a complete kit designed around my motor and mods.....I contacted them Sunday...they emailed me back with questions Monday...I answered them...and am needing a few jets because once this motor breaks in ...it always jumps up a few jets....always happens...so I dont want to be buying 1 jet at a time

[@BrianK-pd4bu]

Did jd jet kit on my sons rm 125 An wow runs much better, don’t sound all backed up anymore, smooth on bottom an hits power band hard!

[@dirtbiketv1]

Great-

[@bigos.motoowens5813]

I have used a needle nose vise grip to hold the carb spring back out of the way while hinging or unhinging the throttle cable, it makes things easier

[@alexanderdefender]

indeed! you can also use a zip tie to keep the spring together

[@mixalis6168]

Cant believe you haven't tested a Smart Carb !!

[@MagisMoto]

Thanks for sharing very helpful

[@ktm2smokers337]

I had horrible results on a 2016 ktm 300 xc. ran terrible loaded up so bad it would hardly run, called jd jetting and they said that ive never herd spot on jetting before, 🤣🤣 took it out and for 14 dollars for the rite needle bike runs awesome now, im at 1500 ft above sea level, dont waste your money!

[@dirtbiketv1]

Thanks for sharing

[@richardtharp1608]

The JD Red Needle (clip on 2nd notch from the Top), 35 Pilot jet, 410 Main.. The stock KTM Needle is CRAP.. 2017 300 XC.. Runs. Strong Bottom to Top.. If you're Riding in the COLD, The Pilot must Be at least a 40.. The only thing that runs better than what I'm suggesting is a Lectron

[@bloomerb4162]

These mikunis are just wacky. Got a 2022 150sx with default factory jetting and it wouldn't idle unless I turned the air screw a quarter turn out. Friends 2019 125sx wouldt get into powerband in 1st, 2nd gear and very burbly, choked up once it got on pipe. Used jd jetting kit but it was still burbly but it was better than before. So he turned in the air screw more than the recommended 1.5 out and it ran way better then. We are very close to sea level.

[@eddies2kturbo]

Having the same issue with my 22 150, I was thinking about buying a Keihin carb or trying the jet block gasket. Also close to sea level at around 200ft elevation.

[@_the_low_gold_gamer_2501]

I just got a 2016 ktm 150sx the owner switched the carb to a mikuni me and my dad just fixed it with I had seen this earlier

[@zacharydewitte384]

I have a 01’ cr 125 r and it came with a 260 main 32.5 pilot thoughts on getting a jd. You prob won’t answer and I’ll do it anyways but I think it’s far from OEM speck. I think I’m going to split cases but apparently it was just don’t I just feel iffy about it and want to check

[@lozadazx14]

The other problem are the reed cage !!!

[@nikolaibielkine8390]

Hello is it possible to send to Germany? Its for the Beta RR 250 racing from 2021. And how much did it costs.

[@zachk7268]

What seat is that? I like the thought of that groove down the middle, almost like a bicycle saddle...

[@dirtbiketv1]

Motoseat can make up whatever you want-

[@woodworm3615]

Slavens has the NEW MULE BILLETRON LECTRON. Do you have anything on this new Carb. Would be interested to know. Thank you.

[@poorwhiteboy6521]

did you still run 60.1 fuel after the new jets ?

[@dirtbiketv1]

Yes - email me with any further questions. contact info in About tab.

[@lisamcdonald8109]

KTM 50cc

[@tuffstuffs]

What about changing the slide to a #5 instead?

[@chrislalonde8180]

Great vid jay but put your helmet on!!!!

[@dirtbiketv1]

opps

[@Brensta18]

Do they make a kit for 2019 150sx?

[@popshmoke]

yes they do!

[@markthornton8898]

Just got my jd jet kit for my 2017 300, it comes with 2 washers, any idea where the big thin washer goes to?

[@dirtbiketv1]

Email me a picture.

[@markthornton8898]

@@dirtbiketv1 sent you a picture on Instagram if that's OK?

[@dirtbiketv1]

Email better sorry. Go to my about and contact easy.

[@markthornton8898]

@@dirtbiketv1 sent

[@mephistoc9286]

The second ring is a spare

[@Gregg0112]

What is the spacer ring in the kit for?

[@umadbroyolo8413]

To adjust the needle up by half a clip.

[@Jakub-bn7sm]

Hi, I am using this kit and I am at same elevation as you. My bike is bogging. But when I leave it idling for a while and then I ride bike feel rich. After couple of revs it is bogging again. I have vforce4 and fmf pipe on bike. What can cause this issues? Thanks

[@dirtbiketv1]

try leaning the clip one spot and also don't have a much idle at all if any- --- Also run air screw at 1.5 and adjust from there-

[@Edgar-jn9xv]

What was the stock main jet ?

[@justinbowman4467]

Hey Jay, thanks for the video. I just bought a 2018 250 XC with 19hrs. and I'm strugling to get the carb setup where I like it so I'm thinking of buying a JD Kit. I'm seeing a lot of talk about doing the "Jarvis Mods" and would like your thoughts on these?

[@dirtbiketv1]

Get the JD kit-- also if you still have a gurgle you can slightly cut the slide.

[@blownn420]

Look into the jet block gasket, these carbs come brand new with bad gaskets sometimes JD sells them for 8 dollars, can help a lot with a low end rich condition.

[@SimplifiedTruth]

@@dirtbiketv1 cut the slide how exactly?thanks

[@Carl0sjim3n3z]

Hello I have a 21 yz125x and have the jd kit with blue needle on 2nd clip 40 pilot and 430 main and get spooge when riding trails. I'm at 3-5k elevation in sother Ca. What do you think I should be running? Red needle?

[@dirtbiketv1]

Red Needle in 3 and then 2

[@Carl0sjim3n3z]

@@dirtbiketv1 pilot and main seem ok?

[@dirtbiketv1]

@@Carl0sjim3n3z Honestly I am not sure- I look at the sheet from JD-- use that -- the needle will be more of the benefit --

[@fullmetaljacket7]

Replace the jet block gasket. (JD Jetting JDMK05).

[@kjclark7]

There's nothing wrong with the stock jetting, the issue on all the mikunis is a bad jet block gasket and needle seat o ring. Instead of buying a JD jet kit for $80, buy the JD block gasket kit for $7.95 and your bike will run great. The bad block gasket introduces too much air into the pilot circuit making it run like crap.

[@blownn420]

Did you do this and it helped your bike? I'm about to install my jet block gasket in a couple days

[@tomaslight]

@@blownn420 do not forget float needle seat o-ring. That sucker starts to leak too.

[@blownn420]

@@tomaslight thanks, yep I got it. I put the new needle seat O ring, jet block gasket, and a new needle jet and its running great! My carb is almost 20 years old, so the needle jet was out of spec

[@robhayter484]

The stock needle are absolute crap rich as hell off idle

[@chalo212]

JD jets are extremely over rated. over priced. Just buy the regular Jetts for your carb. 1 thing that did help was octane booster, Pump gas is 92 or 91, I add VP MADITIVE and its now crispy AF. I add like 50mm to 5L so bottle lasts a long time

[@mattgraham4368]

This is how to fix it: kzbin.info/www/bejne/g2Hcm4mDd9-iaqM

[@terrywilson1362]

Yet another problem with KTM 😂

[@evanjohnson5480]

I had to re jet my kawasaki and honda as well shit for brains. Its pretty standard in carbed bikes reguardless of brand. Stop trying to hide your love for Ktm by pretending to hate.

[@codenamenoob4973]

It's pretty typical to make fun of the most successful brands

[@tomaslight]

those who do not like orange KTM, buy KTM with white frame. Then can buy all bling in blue colour :)

[@terrywilson1362]

Oh no, no love for ktm, just like a Harley, you are paying for a name

[@terrywilson1362]

It's common knowledge that ktm's have more break downs and little things wrong with them, you've got too much shit for brains to accept it

[@robhayter484]

How many turns out on the air screw was you in the end ?