Question about 2004 Yamaha YZ 450 F

2 Answers

I have a 2005 YZ450F and Fuel Runs out of the Caburetor.

When I turn the fuel on a stream of fuel runs out onto the ground through the Caburetor. The bike runs good and seems to operate well, its just when I turn the fuel on it runs through the system onto the ground. I can turn the fuel off and it will run the Carburetor out of fuel untill I turn the fuel back on. Is there a valve that is broken of stuck in the Carburetor?

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 10 Answers

All u got to do is clean the carb and if u find anything broken or worn, replace it. inside the carb theres a little cylinder were the small needle shape piece of metal connected to the floats,it goes up and down in the little cylinder and can possibly have some dirt, sand, grit lodged in there. if u have a manual thats fine, if not, u can be like me and use common sense cause u have to carefully unconnect all the wires connecting to the carb, then get a smaller size screw driver and unscrew the 4 screws connecting the float bowl to the carb, then turn the carb upside down and slowly watch 4 a little white piece of plastic, roughtly a 1 square piece, all it does is help prevent the gas in the bowl from slosthing around, i mean i lost it a million times and it did affect ****. only the best **** talkers and littles boys that think there the **** or RC4 will need that piece. but back to it, just carefully remove the float then unscrew the floats and clean them. if u got a air compresser thats great cause u can blow the air out of the tight spots, u can grab one for 40-50 bucks. then unscrew the cap were the throttle cable enters the carb, pull it out and clean it. make sure to clean out the entire float bowl. real quick u got to unscrew the accelerater pump cover and clean it out,oh and the little brass insert on the left side part of your carb if your looking at it from the back. thats your hot start. follow the hot start cable from the handle to the carb, then unscrew it if it is not already seized, u need to take it out and put a very small amount of grease on it. and remember if u get stuck just think of the situation and use mad common sense and youl be alrite. and since your asking a question that is easly fixed i no u aint a pro so just dont take anything off that i didnt tell u to and youl be just fine

Posted on Feb 02, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

Check flotes

Posted on Mar 12, 2013

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Will not idle without choke


Hi, Anonymous and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
05 yz450f wont idle must run by friday YZ 400 426 450
Wont run without the choke yz450f 03
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-11626-17-11_784.pdf

Jul 21, 2013 | Yamaha YZ 450 F Motorcycles

1 Answer

I have a 2008 yz450f goes good but runs rough at constant engine speed. any tips? cheers


Hi, Blair and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system, carburetor and/or filter.
12. Old dead or bad fuel.
13. Fuel tank vent system plugged or carburetor vent line closed off.
14. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
15. Carburetor controls misadjusted.
16. Damaged carburetor.
17. Incorrect valve timing.
18. Weak or broken valve springs.
19. Damaged intake or exhaust valve.
20. Check for engine trouble codes
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
2008 YZ450F Problems Help PLZ
Carburetor Set up 101
Yamaha YZ450F Owner Service Manual
OEM parts for Yamaha
Yamaha YZ450F Owner Manual

Mar 23, 2013 | 2008 Yamaha yZ450F

1 Answer

2004 GMC Sierra transmission leak running out


from front, back the pan or the overflow tube up top...which spot...repost please...

Jan 21, 2013 | 2004 GMC Sierra

1 Answer

I have an 07 YZ450F, it runs great until it warms up then it starts back firing, bogs and doesn't want to stay running. I checked the vavle clearance, timing and both are good. What else could c


Carburation! If the air/ fuel mixture is not carefully adjusted by the choke system after warmup it will do just what you describe...check it out!

Jan 12, 2013 | Yamaha YZ 450 F Motorcycles

1 Answer

1994 ford taurus will not start new fuel tank,pump,filter only runs when u pour fuel in throttle body rail has pressure


could be a bad ground, i had a ford that did same thing and it turned out to be a broken ground wire at the fender wall near the battery.

Sep 23, 2012 | 1994 Ford Taurus

1 Answer

05 YZ450F wont idle just not sure how to adjust the idle?


Hi, Bryce 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.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
04 yz450f wont idle NEED HELP
06 YZ450F Wont Idle
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-11626-17-11_784.pdf

Jun 25, 2012 | 2004 Yamaha YZ 450 F

1 Answer

Yz 450f starts well runs then stalls will start again run the continues to stall


Hi, Darrenddpele and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. A failed fuel pump, pressure regulator and or fuel injectors.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
06 dies after engine is hot
2010 YZ450f starts but soon stops bike stalls FOUND ANSWER
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-11626-17-11_784.pdf

Apr 29, 2012 | 2005 Yamaha yZ 450 F

1 Answer

I have a 1991 motor home with a 454 engine, I have replaced the oil sending unit twice, the distributor cao and bug. The modual test good. It will start and run for about 20 seconds then dies. runs rough...


It looks like you answered my clarification request by posting a new question. Don't do that... keep it here. I inadvertently answered that question, thinking that someone had started a new thread with no information but "My vehicle has a caburetor."

This really sounds like a fuel delivery problem. It sounds like, while the pump is turning slowly during cranking fuel slowly seeps into the float chamber. Then the motor catches, and the fuel flow cannot meet the demand; the float chamber empties, and the truck dies.

I would take the fuel line off the carb, disable the ignition, point the line into a bucket (*like a coffee can), and crank the engine. You should get pretty good flow into the can. If the pump is electric a good steady flow, if operated by an eccentric on the camshaft timing gear (that is, the pump is bolted onto the side of the timing chain cover) fuel in healthy spurts.

My first suspicion is a really clogged fuel filter, and my second suspicion is a bad fuel pump. a hole in the fuel line, cracked hose, etc, can allow sucking air, which can seriously impair fuel flow.

Jun 23, 2010 | 1991 Chevrolet K1500

1 Answer

O5 mustang stop running think fuel pump problem how do I check make sure changed filter looked very dirty turn key on with line off pumps a good stream


check to see if you are getting fuel to the injectors because it does not sound like the fuel pump if you get a good stream

Apr 05, 2009 | 2005 Ford Mustang

1 Answer

Gas runs out onto the ground when i try to start my motorcycle


What year is it? Does it have fuel injected or carburetor?

Mar 28, 2009 | 2001 Yamaha V Star 1100 Classic

Not finding what you are looking for?
2004 Yamaha YZ 450 F Logo

234 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...