Question about 2004 Yamaha YZ 450 F

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I just got a 05 yamaha yfz450 le and it wants to stall went taking off no matter how much gas you give and it stalls after like 10 seconds of idle after being ridden for 10 mins, i have it running on 92 octain fuel, fresh oil, everything is mint on the quad, i cant find the idle ajust screw, does anyone know where the idle screw is or is it all automatic?

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You need to pull of tne carb and just clean it i mean on the inside Take the floot bowl off its the four scerws on the bottem see how much drit is in the bowl this will give an idia of the condition of the intake air system dirty filter or mabey split air boot Get a can of carb cleaner with the little red spray tube with it The problem sounds like the NEDDLE VALVE that is the valve thats shouts the fuel off when the floots reach there highest point and shouts the fuel off to the engine if it is not sealing the engine would be flooded with gas all the time and cause this problem So take off the carb drain the gas flip it upside down take the scrwes out of the floot bowl save the gasket remove the pin that holds the floots it slides out the neddle valve is drectely under this DON;T start bending tabs just clean the valve and valve seat now sand paper paper towel and carb cleaner then spray throught every venturey you can from the out side in to clean Then reinstall and it will work like new carberators are alway the problem good luck

Posted on Nov 14, 2010

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Hi, Melinda unless you tampered with the idle or A/F screw there is no reason your stalling and the throttle cable are connected that being said stalling at idle is usually a carburetor issue and the usual suspects are:
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It can be low fuel pressure issue or clogged fuel pump. Or its engine related issues,---------------

Check the help link mentioned below to troubleshoot the problem: ------

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http://technoanswers.blogspot.in/2012/01/engine-stalls-when-gas-is-given.html

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http://schematicsdiagram.blogspot.com/2011/12/car-engine-stalls-while-driving.html

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http://repairhelpcenter.blogspot.com/2012/01/car-stalls-and-throws-white-smoke-from.html

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http://www.howtobyme.blogspot.com/2012/07/stalls-and-dies-at-stop-sign.html

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http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html

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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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http://schematicsdiagram.blogspot.in/2012/04/1992-chevrolet-stalls-and-shutdown.html

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http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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Check the help link mentioned below to troubleshoot the problem :------

Engine stalls when gas is given?

http://technoanswers.blogspot.in/2012/01/engine-stalls-when-gas-is-given.html

-------------

Car stalls when MAF sensor is connected?

http://technoanswers.blogspot.in/2012/01/car-stalls-when-maf-sensor-is-connected.html

------------

Car Engine Stalls While Driving?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-stalls-while-driving.html


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http://repairhelpcenter.blogspot.com/2012/01/car-stalls-and-throws-white-smoke-from.html

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http://www.howtobyme.blogspot.com/2012/07/stalls-and-dies-at-stop-sign.html

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http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html


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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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http://schematicsdiagram.blogspot.in/2012/04/1992-chevrolet-stalls-and-shutdown.html

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http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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http://technoanswers.blogspot.in/2012/02/1990-mazda-323-stalls-and-quit-running.html

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http://whatisbyme.blogspot.in/2012/05/2000-toyota-camry-idling-and-stalling.html

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http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html

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http://schematicsdiagram.blogspot.in/2012/03/dodge-dakota-stallsstumbles-at-idlehas.html

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http://whatisbyme.blogspot.in/2012/05/1994-toyota-4runner-stalls-and-stops.html

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http://technoanswers.blogspot.in/2012/04/1997-toyota-camry-erratic-idle-and.html

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http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html
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Vehicle starts then stalls and shutdown? http://schematicsdiagram.blogspot.in/2012/04/1992-chevrolet-stalls-and-shutdown.html

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I have a 2006 victory vegas 8 ball w/ 900 miles on it. It has never had a problem staying started. For some reason now, i turn it on it stays running for about 3 seconds before it stalls. The air filter is...


Hi, Thomasyu2004 and the usual suspects are:
1. Idle port, transfer ports, slow air jet clogged.
2. Idle adjusting screw set too low.
3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
9. Fuel line to carburetor kinked or pinched.
10. Fuel filter clogged.
11. Intake manifold leak.
12. The gas cap is not venting properly or fuel tank venting system blocked.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
15. Multi carburetors not in sync.
16. Faulty fuel pump.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Hi, Nigel_46 and the usual suspects are:
1. Idle circuit and transfer ports clogged.
2. Air fuel mixture adjustment too lean.
3. Pilot jet clogged.
4. Faulty accelerator pump.
5. Float level too low.
6. Float bowl contaminated old fuel, water, dirt, rust, etc.
7. Float bowl vent or overflow tube clogged.
8. Fuel flow to carburetor restricted.
9. Intake manifold leak.
10. The gas cap is not venting properly or fuel tank venting system blocked.
11. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
12. Needle and seat stuck closed in the float bowl.
13. Multi carburetors not in sync.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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