How to fix cutting out / bog on any fcr carb when punching the throttle

How to fix the cutting out or bog when snapping the throttle on an fcr carb. Most of the time either the jets are plugged or in this case it was the accelerator pump. Feel free to leave a comment with any questions

This bike is a crf150r but this method goes for fcr32s all the way up to fcr38s and more. Some bikes that use these carbs are all the liquid cooled (except for efi) crf’s, kxf’s, yzf’s, and more. 150 to 450cc.

Tags:
Crf450r crf250r kx250f bogging acceleration full throttle kx450f rmz250 rmz450 crf150rb 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 yz450f yz250f carburetor accelerator pump

[apexlawn]

Brilliant, thanks for a great video to solve bogging problem... Awesome

[davelambardo]

Out of the 900 videos I watched trying to tune my carb. Yours is up in top becuase it's simple..

[basswarehouse]

Hey man, random question. I just got an exhaust plug today for my 2010 yz 450f. I put the plug in and forgot about it and tried to kickstart it. The bike wouldn’t start and noticed there was less compression as well as a sound that sounded like air was being sucked. I pulled the exhaust plug out and it fired right up but I’m worried I may have messed up something internal by doing that. What’s your thoughts?

[tylermiller]

I know this is an old video and is a long shot but I have a 2003 yz250f with a brand new carb from Rocky Mountain ATV and the bike starts and idles great but when I put the bike in gear and accelerate it spits and sputters then come alive do you think this will fix that problem thanks in advance

[ganggas]

I have a KTM 450 exc-R from 2010. After replacing my exhaust silencer, my motocross dies after long rides. I wait a moment and give the gas a few times when standing still. After a while it starts up again. I have the impression that he is not getting enough fluid, what can I do about this?

[Kaysr]

i have a gsxr 600 that will cut on and off at around 134 some times. It feels like a aggressive jerk and rpm drop

[thetrainmaster.]

Hey in my 150r my hot start fell out of the carb and idk how to put it back in, I know where it goes but my hands can’t fit in my engine bay, any help?

[maxxin]

I have a 150r when I go past 50% throttle it bogs! Would this fix it?

[justsense]

I have a coolster 150cc that when I hit the throttle it'll pop and not really go anywhere. Will this fix it

[semir]

Hi, my kxf250 2014 when i open throttle fast my kx bogs and after second ride normal on Everly gear. When it stay have problem with idle rpms.. its maybe turnished contacts

[armondogarcia]

So I have a gs500f and I cleaned the carbs the other day and it ran fine today I took it on the highway and soon as I got on the throttle it bogged out and died and I had to stop and wait and it started again and did the same thing idk what the issue is??

[adenvanderwater]

Question idk if this has anything to do with it but I got a crf450r it’ll start but when I give it any throttle it popps (while throttling) and idea as to why that would happen?

[GaryMSanchez]

I’ve got a 2007 Honda Steed...it’ll start up and drive like normal. Then, it’ll struggle and lose all power and sit idling (but i can’t give it any gas or it’ll die)...try starting it a few times for a few minutes and then it starts right up and goes fine....then later the same thing. I had a guy fix the carburetor, but what are your suggestions? Thanks man! (I’ll try what you show in your video as well)

[lilused]

"once that's out and now your screw is gone" had me going lol

[Gkett]

I used an o-ring from a new chain I had and it worked perfect 👌

[KollynJ]

What do you mean an oring? I guess I’m not sure where it’s going exactly

[Dirt_Serpent]

I got my accelerator pump firing good, but I still stall if I crack the throttle too fast. Gonna put in a bigger pilot

[mustang]

So casually adds the, ,and then lose the screw, , lololo....everyone is now losing the screw as part of the step.

[iandarrach]

Also have a question I have a 2003 crf450r just rebuilt just did a new ap diaphragm but has a bog when I punch it hard but I can also hold the throttle threw the bog and it eventually takes off think this will fix it?

[kylenelson]

I have a 2008 rmz250 and it does this off of idle when you give it full throttle would this fix it?