The "choke" on this particular carb is actually an enricher. Lever up/plunger up/valve open let's air into the bowl to atomize with fuel and return to the other side of the carb. More fuel/less air/fuel RICH environment causes it to idle lower(bogging with more fuel without more air) Lever down/plunger down/valve closed keeps air out of the bowl which means no extra fuel. More air/less fuel/lean environment causes higher idle(just like cracking a butterfly valve or a vacuum leak is more air with same fuel) This is usually the case when a bike can be started lean until it idles up, then hit the lever, it idles down.
@@silentlyfe3660 usually if the outside temp is warm enough, choke is not needed. in your case once it starts you can lift the choke after 30sec-1min once its warmed up. cheers!
I appreciate this video so much. I just got my first pit bike on Friday, and couldn't find any help specifically for the 22mm Mikuni carb. This helped a whole lot.
That's a chinese copy mikuni,..I have one,...the real one has a big idle screw with a spring around it and the mixture screw is on the same wall as the idle screw,..and the real one is bigger,..but the copy runs better than any stock carb at least !! The copy has a clip to hold the needle down,..and the authentic one has a plate to hold it in !!
Hello, the throttle cable will not come out from the top of the carby. Even though I have unscrewed it and used some force it won’t come out. Any suggestions at all. I’m trying to replace the carb on a 150cc Chinese pit bike that isn’t running but can’t get the throttle cable out. Any suggestions would be great please.
Cole TRICKLE the slide that the cable is attached too has a title channel it rides in to hold it straight push up and wiggle the slide in the carb while pulling up on the cable. Should not require a lot of force Also the screw on the side of the slide is the slide stop it sets the idle position maybe that is pinching the slide back it out a few turns
Hey bud great video, it was useful. I have a problem on my pit bike dream speed 150 yx. My main jet is a 150. When i keep the pit bike on low rmp i have no problem, the problem comes when i accelerate little bit much the pit starts to die, it feels like that there isnt fuel. Sorry for my grammar im italian.
Mr.FlyMan _ could the carb be flooding with such a large main jet? If you pull the plug is it wet? If it’s lean a larger main jet or raising the needle up a notch
Last carby I had wash shanked hard bike running like poo pulled it apart wasent put back together propley pilet jet was blocked couldn't unblock so put it back in gaskets or o ring was gone fixed that with old headphone wire bit of glue bike been running hard as change carby sustainable ending feel the same 😂😂😂😂😂idk y my carby called old and faithful
The "choke" on this particular carb is actually an enricher.
Lever up/plunger up/valve open let's air into the bowl to atomize with fuel and return to the other side of the carb. More fuel/less air/fuel RICH environment causes it to idle lower(bogging with more fuel without more air)
Lever down/plunger down/valve closed keeps air out of the bowl which means no extra fuel. More air/less fuel/lean environment causes higher idle(just like cracking a butterfly valve or a vacuum leak is more air with same fuel)
This is usually the case when a bike can be started lean until it idles up, then hit the lever, it idles down.
Robert Wattner thanks for the feedback!
so when i start is cold. should i have lever/choke up or down?
UP. once your ready to ride , push lever DOWN
@@apexiblaster do i take the choke off right after its started? or does it have to stay on until its warm?
@@silentlyfe3660 usually if the outside temp is warm enough, choke is not needed. in your case once it starts you can lift the choke after 30sec-1min once its warmed up. cheers!
I appreciate this video so much. I just got my first pit bike on Friday, and couldn't find any help specifically for the 22mm Mikuni carb. This helped a whole lot.
gregorio-alexis colon thank you, glad it helped
I was nervous for you when trying to unscrew the Philips screw at 3:35 ! Thanks for making this video. Will help me clean the carbs tonight.
Thanks for this carburetor cleaning video it made my life a little easier👍
Thanks for this tutorial! Helped me revive my carb and get my bike working again!
Perfect just what I needed to fix my m2r 125
That's a chinese copy mikuni,..I have one,...the real one has a big idle screw with a spring around it and the mixture screw is on the same wall as the idle screw,..and the real one is bigger,..but the copy runs better than any stock carb at least !! The copy has a clip to hold the needle down,..and the authentic one has a plate to hold it in !!
SilkySlim thanks for the info! I am sure these pitbike companies rip everyone off
Very helpful!
Fuck yeah thanks dude this video helped me get my shit running perfect
Killer man!
Perfect.
13.33 did u put the washer and the rubber o ring in 😳😳
I came across a small washer and o-ring on mine. I didn't see that you had those on yours? Any idea where it might go?
cool video i have same carb on my pitbike and was wondering what screw is what :D
May I ask a bit of advise cause I did this and my bike still don't wanna stary
i have a issue where whenever i put gas in the tank it all empties threw the vent tube would a needle seat cause this?
or would a float drain be more likely?
Hello, the throttle cable will not come out from the top of the carby. Even though I have unscrewed it and used some force it won’t come out. Any suggestions at all. I’m trying to replace the carb on a 150cc Chinese pit bike that isn’t running but can’t get the throttle cable out.
Any suggestions would be great please.
Cole TRICKLE the slide that the cable is attached too has a title channel it rides in to hold it straight push up and wiggle the slide in the carb while pulling up on the cable.
Should not require a lot of force
Also the screw on the side of the slide is the slide stop it sets the idle position maybe that is pinching the slide back it out a few turns
Tittan1500
Thankyou very much for the reply. I’ll give it a go. Cheers mate.
Hey bud great video, it was useful. I have a problem on my pit bike dream speed 150 yx. My main jet is a 150. When i keep the pit bike on low rmp i have no problem, the problem comes when i accelerate little bit much the pit starts to die, it feels like that there isnt fuel. Sorry for my grammar im italian.
Mr.FlyMan _ could the carb be flooding with such a large main jet? If you pull the plug is it wet?
If it’s lean a larger main jet or raising the needle up a notch
tittan1500 what u mean by plug..the candle?
Mr.FlyMan _ spark plug
tittan1500 oh yes because here in italy we call it candle hahahah. I didnt see it yet.
I'll let u know thanks.
is that mix screw just control air?
Nice Mikuni Clone
My mini bike wants to take off how can I turn it down ? Thanks
Great instruction, thank you!
Good video
Hey, great video!! Thanks.
BurNingRubber140 thank you sir
What's the recommended amount of turns for the high jet?
what nozzles did you use?
Hi, my carb runs okay but it falls on its face when u go wide open?
MJ plugged main jet or it’s not getting enough fuel flow through the petcock / fuel filter
If you changed jets it could be way rich but prob not
@@tittan1500 thanks I'm going to clean it
where could I get the right size jets for this carb?
pkoktAlo TBoltUSA
what kind of rear shock is on the back of your pit bike? im curious
randy knudson can’t remember it was an ebay special
So what is choke down or up?
On THIS carb; up. Not as said in video. Lever down/plunger down is run position.
Last carby I had wash shanked hard bike running like poo pulled it apart wasent put back together propley pilet jet was blocked couldn't unblock so put it back in gaskets or o ring was gone fixed that with old headphone wire bit of glue bike been running hard as change carby sustainable ending feel the same 😂😂😂😂😂idk y my carby called old and faithful
MADNESS production hell ya man do what you gotta do
***WARNING*** THIS IS NOT A REAL MIKUNI CARB!!!!
Ok thanks for the update, most pit bike use non genuine carbs