Видео

Can k dirty air filter cause this ?

I believe it's lean due to k&n filter with stock settings. Either richen up the main and pilot jets or get a uni filter that'll pull more vacuum on the fuel line

I have this exact problem In a 2007 Kxf 90 I replaced carb I replaced sparks I replaced fuel filter I replaced ignition module

Mines doing the same this did you find out what's wrong only thing I haven't dun is clean cok pit and I also need to adjust the timing chane

Did you ever figure this out? Mine does the same thing in neutral, but in any of the gears it doesn't. Pulls like a bastard and doesn't stumble at all. A couple people told me this was normal... Carb can't be set lean - has too much power to be set lean.

air screw adjustment i went up to a 25 pilot air screw 2 turns out

Hi guys i changed my petcock i changed my change i changed my plugs and fluids ,my bike rides for 10 minutes and shuts off. Then battles to start, when i play with the choke it eventually starts but dies as i ride off. after 20 minutes it starts up and rides again for another then minutes. what could be the issue

Next time, turn the fuel off, then crank it until it runs out and you won’t have that gas spill

Adjust your float

It’s your valves

Answer to fix this problem, is change the main jet anther size bigger because it’s not getting enough fuel. If quad is doing exactly what video guy said, starts right up, idols great, slow hit the gas and runs yet putting the gas in to far then starts to bog, it’s because it starving for fuel. I had the same issue and all I did was change the main jet to a bigger size and revs up great and quad rips!!

Out of all the comments I’m yet to see a fix ….. smh

Do you have part 2?

may or may not be a faulty ignition coil

Could be a bad cdi box🤔

Do you know what is the issue if the throttle is hanging

Are those houser arms for the kfx450r? Or do you have to buy TRX450 arms?

For any with same issue! My yamaha 350 with mikuni is doing same thing. The only thing I have not done is removing the imulsion tube that slide tube needle and main jet operate in. Part is available but resolution is poor to see if it actually has air holes in it to increase the Venturi vaccumn upon idle to WOT. No accelerator pump in this model carb.

Accelerator pump the round gasket could have a pinhole and cause this. Make sure the round gasket has no holes and is seated perfectly. I’ve had to use rtv to hold it in the groove which works fine using as little as possible and clean as possible

What year was this mines an old 06 and frame is close

Choke is on

I had same problem is that gas line coming from that gas tank

So I'm having the same problem just today. Went riding started acting weird. A lot of back fire too. So got home going to take carb apart clean it. I think my problem is I got a new hmf exhaust . Put it on but didn't put new jet in carb it recommended. So I'll let u know if she starts up. And that was the issue.

Kx cam?

Funny h say this my dirt bike is having the same prob and also I just got a Suzuki ltz 400

(If you have cleaned your carb) It could be the air filter. You can’t run an open air filter due to air to fuel ratio. You need the air filter box and snorkel and the box needs to be closed. If you want to run open air filter then you ned bigger jets. How big? Idk do some googling and you’ll find out. Good luck!

Had this problem, couldn’t go anywhere. Pulled the fuel line off and it was just trickling. Turned it to PRI whatever that means, all kinds of fuel came out. Didn’t help. Put it back to on, drained the bowl on the carb and no problems since

In the bottom of the bowl of the carb there a little rubber peice that shoots fuel into it

Turn your idle screw up.. or adjust the fuel mixture screw then idle

leav the petekok on prime or on on is much beter

When is part 2 going to be uploaded?

Improper jetting

Is the gas even on?

What brand are this frame guards/ protectors ?

My 04 ltz400 is doing the same thing and when I slow down, it shuts off. I have to hold the throttle on at a very high idle to keep it from stalling. It's really annoying and can't get it figured out.

Big fan of the head lamps

Just to say, I had carburetor problems too. I replaced the fuel tap to one off a raptor, as it has an "off" setting. This means that the fuel is not constantly filling carb when not in use. I believe it deteriorates the o-rings in carb, so this will prolong it.. Also I was losing power when revved up in 3rd 4th 5th. Turns out got my carb rebuilt, never looked back.. some animal now lol

Boss man message me if possible lileddiie23@gmail.com

Check the float height

It needs the carburetor cleaned

Adjust the fuel screw 2-3 turns out

It’s air to fuel ratio it needs to be jetted I got a 03 kfx400 had same problem

Does anyone know where I can find plastics for mine?

My KFX400 doesn’t idle but if I give it gas it stays on any help with making it stay idle?

In my case this is caused by a lean mixture, which is consequence of running a free flow exhaust (non specific for the model and without any baffle) which causes a lack of backpressure effect. Without backpressure, the quad tends to run leaner because you have more exhaust flow but less velocity, so the engine still retain some gas inside the combustion chamber on the next cycle, causing more heat. Actually if you run a specific exhaust (OEM or aftermaket) for your model with baffle in it you will see the fan will start less times on the same trails (which is a synonym to less heat generated, guess out why?)

you mite have to pull the caps covering adjustment screw for high speed and maybe low speed too

carb needs adjustment high speed jet

What do you recommend for Jets in a 2007 YFZ450 with HMF slip on and no lid??

I have been a Suzuki master tech at their importing plant in choriso california, it’s the air flow and fuel feed rapid adjuster setting while riding the atv using your left hand 🖐 go to the left side of the carb and give the black knob a turn you will know when you found the sweet spot it is a easy 10 hp gain also

Did you ever fix this issue? I’m having the same problem please help