Question about 2003 Yamaha YZ 250

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My float needle valve is stuck closed on my 03 yz250. I can not seem to get the valve out of the seat is it because I let gas lacquer it up. As I took the floats out and the little spring on the valve/seat. Please advise the best way to clear out the obstructed valve/seat,caused by not draining my float bowl. Dah!

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  • Yamaha Master
  • 39,875 Answers

Hi, Rachelgehrer for more information about your question and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2001 YZ 250 sticking float Yamaha 2 Stroke
Carburetor float needle and seat trick
YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Posted on Jul 26, 2016

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6ya6ya
  • 2 Answers

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

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Posted on Jan 02, 2017

tellme2
  • 137 Answers

SOURCE: starts easy wont rev at all

hi m8y,, soundz to me the float heights are wrong,,have u tried that at all, u can only check that when the carbs are taken out and turned upside down,, all four floats should be the same height,, check wot the measurements should be in the manual,,if u have one,, if u havent try these guyz 4 a downloadable manual,,, www.repairmanual.com ,, if all is cool and correct,come back in m8 and il take u threw the next step,, cheers

Posted on Apr 28, 2009

MakisRC51
  • 408 Answers

SOURCE: Bike will not idle and it seams that the floats say

The pump has a cut-off relay that senses the pressure and stops the pump.If the floats works properly they will lift the nose that cut the gas off and the relay will cut the power off the pump.
If that is not happening then something is wrong with the wiring.

Posted on Jun 14, 2009

  • 3567 Answers

SOURCE: My TTR 125 wouldn't start after being idle for

The adjuster tang on the float (in green) rises and falls to maintain fuel level. It pushes on the float needle to stop the flow and drops to let fuel in. Did you loose the needle? If all parts are there, gently bend the tang upward to lower the gas level in the carb.

A “very helpful” rating for this answer? Thanks!

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Posted on Jun 28, 2009

digritz
  • 530 Answers

SOURCE: Gas coming out yz 125 airway next to float bowl

By spraying it you may have inadvertently blown dirt or grime even further into the carb. It doesn't take much to cause the float to stick open. This would result in a constant flow of fuel into the bowl. Once filled it will escape via the overflow.
The best way to clean the carb is to remove it from the motor, disassemble it and clean it using a small brush. If you have never done this before just take you time and make sure you have a clean work space to do this in. There are really very few parts to this type of carburetor and once you have done it a couple time you can take it apart clean it and have it back on in under an hour.
Hope this helps.

Posted on Sep 03, 2009

ollie reece
  • 1167 Answers

SOURCE: ttr125 no gas getting to the carb.

buddy have you tried adjusting the float well get back to me if not

Posted on Oct 25, 2009

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I have a 2003 honda cr 250r 2 stroke,It will not kickstart,you can bump start it and it starts right up and runs really good.when you try and kick it it leaks gas out of the carborator.


Usually, a leaking carb is because either the float is set too high, or there is some crud stuck between the float's needle valve and it's seat.
Either one will not allow the float/needle valve to shut off the flow of gas when the float bowl get's full.

This should be your carb:

http://www.bikebandit.com/houseofmotorcycles/2003-honda-cr250r-carburetor-02-03/o/m2194sch305112

The floats are the 2 large square items on #5 on the illustration.
Item #3 is the float needle valve.
Item #4 is the needle valve's seat.

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this is the float stuck. the tube sends the fuel to the earth
preventing fire and you legs burned to a crisp.
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clean the carb. it the float needle and seat and bingo fixed.
done mine 100s of times, 1963 to now.
i still have a 1991 honda today.; (restored, 305) CL77

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Thiis usually caused by a failure of either the float valve or the float itself.

Bad float needle valve: If some dirt or other particle gets stuck on the needle valve or seat, the valve will not be able to completely close and fuel will continue to flow into the bowl and eventually overflow. A new needle valve and seat are < $5.00 on-line.

Bad float: If the circular float gets a hole in it, fuel will get inside and the "float" will get heavy and no longer float on top of the fuel in the bowl. Because it doesn't float it will not rise high enough to push the needle up into the seat and keep extra fuel from entering the bowl. A new circular float is < $10 on-line.

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