How to jet 4 stroke dirt bike carburetor using JD Jetting Kit - Yamaha YZ250F update
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- Опубліковано 14 лис 2017
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www.jdjetting.com/
I am fixing carburetor issues on my dirt bike Yamaha YZ250F. Removing the carburetor, inspecting and cleaning all the parts including rubber boot for the cylinder-carburetor connection. I had idle issues and hesitation in low rpm. I used JD Jetting kit to tune my Keihin FCR carburetor and I am please by the results. This video shows step by step guide how to jet 4 stroke carburetor on a dirt bike using JD Jetting kit.
/ dirtniron
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Get jealous of how much bikes you have every time i get on your channel ): keep up the great work bro !
I only need 1 bike, maybe 2. If it would not be for the channel I would keep 2 stroke for trails and one 450 4 stroke for mx. or maybe just get one 350 4 stroke for everything.. thanks for support Alex!
If you were uploaded this video 3 months before I would have been happy because I do not had suck a pain when I tried to clean my carb. You are the best ! Your videos are so useful, best dirt-bike channel !
oh, too bad I was late. did you figure it out?
Yes, I figure it out, keep goin', you do a great job.
Great vid. Thanks putting this together !
Well, you taught me something new! I've had my YFZ450 quad carb off (very similar) and i did not know there was a leak jet in the bottom of the bowl.
cool, I am glad the video is helping ;) thanks for the comment Chris!
@@dirtniron Hello, I have the '05 WR450F runs great but pops alot on decel. 170 Main and 48 pilot and already 3 turns out on air screw, not doing more, should I try a 50 pilot perhaps?
Great Video! very detailed and organized!
thanks brother!
Cool dog and great video, I have one of JD kits on my 2004 rm250 and they work great.
yea, they know their stuff. my ktm 250sx runs great with the kit
Haha there's a spider running across the floor at 9:20
yea, as "kubyik" commented, its another companion, lol!
Thats one clean workshop.
thanks bro
Bike looking good, good vid as usual
thanks Dan!
Thanks for the video, please next time do close ups of some of the work l, like that o ring and jets. I got the point but it would have been awesome to get the close up. Thanks again.
this one should be better ua-cam.com/video/lj5Rakk69uw/v-deo.html
Best vid out there great job
Thanks man, didn't expect that ;)
I like your passive doggo
thanks man ;)
Every time I watch a carb video I fall more in love with EFI lol.
thats right ;)
Sweet vid 🤙🤙
thanks !
another cool vid man
thanks man
Spider on your floor😂 Thanks for sharing 🙂
Me: Hell ya, another great bike tip video
Me at @2:57: HELL YA A DOG
Hi your videos are so helfull. I d like you to make a video explaining the wiring of the speedometer of the wr 450 . I just got one rencently and it doesn t have the speedo original. I m lost with the cables.
thanks man! sorry, but I sold the wr already.. I am sure you can find the wiring diagram online..
You make everything look so simple! great video from a great teacher! is that why the bike was having trouble starting? it just needed a good carb clean?
cleaned the carburetor, cleaned the boot connecting carburetor to cylinder, new jets and needle and bike runs fine.thanks for the comment bro!
Dirt N Iron sweet man anytime
Idle seems a little high but wow what a difference from when you bought it!
definitely needs some fine tuning, its was still very raw
9:20 something crawling on the floor 😆
Great video
Where did you get the O rings for the accelerator pump?
Thanks man. It came with jd jetting kit
I would have checked the AP timing and adjusted it while I had the carby off the bike...but I like to see it squirt anyway, even if it’s adjusted right
Good tip! thanks Ronan
Pra que serve esse kit JD jeting?🇧🇷
Can you do a video of how to make rims black and not scratch off or fade? Also it would be a cool mod to give the bike a new look.
i can try, I think powder coating is the way to go
I need you to adjust my wr250 cant get it
Did you do something special to get your seat to sit flush against the frame? I got that acerbis gas tank too but theres a little gap between my seat and air box because the tank sits a little high. Did yours just go on flush?
no I didnt, it was like that when I got the bike
Hey great video. What year is that bike? Mine is an 03 yz250f
yea, this one is 2003 too
Don't wake up the baby or the wife while revving your bike!! :)
haha, you guys are so funny today ;)
she was actually upset bc I did wake her up
You don't have to remove carb to install pilot jet? I just got a YZ450 and it won't run off choke so I got a bigger jet for it.
try to loosen the clamps and twist the carb to get the access to the jets.. it can work
Little bug on floor at 9:18 is gettin in some track time.
I have a 2008 Yz250f I bought the bike in the summers day it ran great, in the fall I noticed bogging at high rpms and when I would open the throttle fast while idling it would die, I also have a lot of backfiring on deceleration. I opened the carb and it was clean and all the jets were clean, the accelerator pump diaphragm was in good shape. I got an adjustable fuel screw and when I went to install it the previous owner had the stock fuel screw at 3.5 turns out which makes me think I need a bigger jet. I read a document online and it said that colder conditions can cause the bike to not get enough fuel and you have to get a bigger jet. Also when I turn the choke on the bike runs great. I tried the trick to pull the hot start in and it should idle up but it did not do that. Any advice would be much appreciated
I also notice when I rev the bike there’s a bit of a hang before it drops down to idle
yes, seems like its running lean, bigger jets .. that should help
Great video man. Like the simplicity of how fix things on these bikes. Keep it up but maybe we could do with out the commercials. Not sure how much that helps you having them play during the videos but it is kinda annoying sometimes.
pjbuckmaster if you are wanting to see more videos comisng the commercials are kinda imortant!
+pjbuckmaster thanks for the comment, let me see what can be done with the ads in the middle. I thought they just show banner.
I️ understand about getting paid, but I️ live where internet is very limited so watching videos that have commercials really adds lots of time to view videos from people I️ like and then I️ lose them or have to stop watching them. It is not that big of a concern to most but just adds lots of minutes to my view pleasure when I️ have to wait for it to load.
I have a wr400f yamaha 2000
My carburetor bugs when you cracked the throttle fast what do you think the problem is
it sounds like it could be lean, try to adjust fuel screw, or raise a needle a notch or even go bigger one size on pilot jet. my next video will be about fuel screw adjustment, I will post in couple days
If I put an exhaust on my 2008 YZ 450 how do I know what size jet it will need?
follow the chart first and then see if you need to adjust it
for wr250f 2005 with 45 pilot and 168 main jet i can not choose the correct iddle can you help me bro. Thanks
check my video on fuel screw adjustment.. it gives you the info to adjust the idle. do the search : dirt n iron wr450 fuel screw
I think that I'd "deep six" that carb and put in a Lectron.....and live happily ever after. Just one old guy's opinion. I know those carbs work pretty OK but it has more parts than the Apollo spacecraft. Parts not in original never give you problems.....
hahah, you are getting more and more funny ;)
Can you do a video on flywheel weights?
i need to get one first, I am considering it . thanks for suggestion
1:00 AM here, must go to sleep, I'll edit this comment later after watching the video ;)
EDIT: Great video! detailed enough.
How long it took you from the moment you first started recording the video until the "Stayed motivated" ending? :P
So how do you select the needle position?
Cute dog btw! :)
cool, look forward to see your feedback, nite!
Edited :P
+Nir Hason this one took 2 days :)
Lots of work! The final results is great!
So how do you know what the needle position should be?
I was using JD jetting kit, so i followed their recommendations for altitude. It changes each 3000 feet. If I would be on 0-3000 I would leave the needle on 5th clip. I live in 4000ft elevation so I moved my needle lower to make it little leaner. if you raise the clip the needle drops lower, hence blocks more fuel and allows more air in the mixture.
Can I use 2003 yz450f fcr carburetor rebuild kit for 2003 wr450f fcr carburetor? Is it fit?
its the same carb, just make sure you have correct jet sizes
My bike does not bog but it seems like its hesitating as try to go faster in every gear, it will jerk with bursts of speed..what could the problem be?...thinking about getting a jetting kit
I have a 02 ktm 400 exc, 4 stroke..
could be too lean, try to adjust the fuel screw or maybe go one size bigger on the jet. if the hesitation is on the bottom then change pilot jet. You can also try to raise the needle one notch
@@dirtniron ok, just went through my carb & removed all of the jets & found that my idle jet was cracked. I'll replace it, use your advice & let you know asap. Thanks.
you know that on the aluminum fram 07 to 2012 , you cant the the carb out without removing the rear shock ! you are lucky it's a steel frame !
+Vegas RoManiac yeah I saw some guys removing the shock and even subframe. Glad I didn't have to do that.
Yes you can I had a bilateral aluminum frame 2006 250f and you can . Just takes skills
9:20, whats that running on the floor? another companion? :D Btw, great vid, as always
+kubyik hahaha, you got me laugh so hard! Thanks man!
LOL I noticed that too (waited to see if someone else did in the comments)
I am in need of help!!! I have a 1984 Honda XR 200 (4-stroke) and I constantly smokes but still runs and is rideable but every like 3 or 4 rides(2-4 hour long rides with breaks in between) I always have to put more oil in it(yes there is oil in it and it still smokes). I don’t know what part to buy to fix it to stop smoking, can you please help me out and thanks! @DirtNIorn
Unleash_Beast check if you have adequate compression in the cylinder and check if the oil ring around the piston is shot
I think you need new top end
Rings could be bad, or it could be your valve seals.
I put my carburetor position on open I kicked it over and I heard a straw sound a slurping sound like from a straw. what is that. I never heard it before.
i am not sure bro, sorry
is it still doing it?
believe it or not I was doing the 4-stroke kick technique with the top dead center that you showed on one of your videos. When I noticed the weird sound. No I don't think so. I have to check on it once in awhile.. do you have any recommendations
I am not sure Anthony, do it again see if the problem is still there
Yes. I'll kick start again see what happens.. I had the carburetor on half open.. when I open the carburetor fully open it made that sound. The case had has never been removed
hellow sir great i hope someday give me motor because im a foor guy godbless sir
what year is your bike?
This is 2003
I have a 2006 YZ250F is 145 hours considered a lot?. I’ve also haven’t adjusted the valves or anything like that just basic maintenance like oil and air filter. I don’t race just trails. What should I do to keep the bike running strong?
my yz had 500 hours on it when I rebuilt the motor , but valves are what you need to check above all , and timing chain , if that one snaps, bye bye bike, you will spend 2k on the rebuild. I checked m valves every 50-100 hours !
Vegas RoManiac I bought the bike with 130 hours on it for 2k I put 15 hours on it since then should I replace the timing chain?
keep valves in specs, check the compression specially if you feel bike is loosing power and is too easy to kick over. It all depends how you ride and how well you maintain it. Keep periodic oil changes, oil filter changes and keep air filter clean, thats a must.
Dirt N Iron thanks. I know you recommend rotella but I heard it isn’t good for bikes on some forums. have you had any issues with it? Seems weird to put diesel oil in a high compress motor
diesel engines have very high compression ratio. compression is what ignites fuel in diesel engines. rotella is designed for high ratio engines, haven't had any issues so far
Wife is not asleep anymore
haha, we have detached garage but she still heard it ;)
How to Jet carburetor...you don't you a get a fuel injected bike.