Question about 2003 Yamaha YZ 125

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I have a 2003 TTR 125, Bike runs great but everytime I turn the gas on or reserve it pours out of the overflow onto the ground...any ideas on how to resolve?

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You need to clean or replace the float valve in the carburator.

Posted on Nov 15, 2010

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1 Answer

Ok I just bought a 2003 Yamaha ttr-125 but I don't


If the bike has an electric stater it is a 125LE if it doesnt it is either a ttr125 or a ttr125L

Jul 21, 2013 | Motorcycles

2 Answers

2006 Yamaha TTR 125E - carb not getting gas


Hi, Kevin always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing*
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn*
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working*
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
* If equipped or applicable.
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.
Dirt Rider Magazine
TTR 125 won start need help TTR
Yamaha TT R125EW Owner Service Manual
OEM parts for Yamaha
Yamaha TT R125E Owner Manual

Jun 13, 2013 | 2006 Yamaha TTR 125 E

1 Answer

2002 ttr 125 fuel leaking out overflow tube


Hi, Anonymous and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
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.
TTR125 dirtbike leaking gas from carburator overflow tube AR15 COM
TTR 125 Fuel Overflow Problem
YAMAHA TT R125 Owner Service Manual
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YAMAHA TT R110E Owner Manual

Jul 21, 2012 | 2002 Yamaha TT-R 125

1 Answer

Okay so I have a 2003 Yamaha TTR-125 dirtbike, it is NOT electric start, it is kick-start. All of the plastics were replaced so I do not have the original stickers on it with the model, therefore I forgot...


There is a frame number stamped on the frame neck. If you call a dealer they can look up the year and model using an ID microfiche. Next to the stamped frame number there should be a riveted plate with the VIN number on it . If this plate is still on your frame it also has the model number and the model year of the motorcycle clearly printed on it. All Yamaha dealers have the ability to ID your machine using the Vehicle Identification Number.

Dec 30, 2010 | 2003 Yamaha TT-R 125 LE

1 Answer

Which way should the reserve tap be facing so its off and not using the reserve??


There is usually "on","Prim",and "Res". If in the on position it only uses fuel when the bike is running. so thats where it should be unless your low on gas and need reserve. The pri position should only be used for a few seconds or used to start the bike and once started should be switched to on.

Apr 17, 2010 | 2003 Suzuki GZ 125 Marauder

2 Answers

I have a 1998 yz 125 while it is running gas is pouring out of muffle


The only way that can happen is if gas is overflowing in the carb and running down the cylinder wall and into the exhaust port and / or into the crankcase. Gearbox oil is separate from the crankcase. The crank gets lubrication from the gas/oil mix. Be sure to turn off the gas valve at the tank when the bike is not in use. If you can manage it, pull the head off, (or at least remove the spark plug ), then, with the piston at bottom of the stroke, turn the bike upside down to drain the gas from the crank. I would then remove and clean the carb to be sure the float is not sticking open. Be sure the overflow line is not blocked. Install an in-line fuel filter. Please rate my answer. Thanks.

Jan 10, 2010 | 2003 Yamaha YZ 125

2 Answers

When i turn the fuel on to start the bike gas pours out the clear tube that comes from the carb to under the bike some were is this line dis conected or broke or is it something more


it's probably just your overflow from the float. it doesn't connect to anything, it just let the fuel overflow come out when your float level is high. if you turn on the fuel petcock and it starts pouring out, your float needle is sticking. clean the carb and the float needle valve assembly and see what happens.

Dec 30, 2009 | 2003 Yamaha TT-R 125

2 Answers

2006 Yamaha TTR 50E pouring oil out of air cleaner housing


With the oil problem I read on another site that Yamaha did that so that excess oil would be burned up in normal running (but this was usually smaller amounts). Anyways they disconnected the tube going to the air cleaner and had tied up in such a way that any excess oil would land on the chain thus lubricating it. But if you have that much oil coming out it could be that you have put in too much.

Apr 21, 2009 | 2005 Yamaha TT-R 125 E

1 Answer

Fuel leak


Wait... fuel is pouring out of the crankcase breather? Are you sure it's not the carb overflow tube? The crankcase breather should be going back into your airbox or through some kind of filter. If gas is coming out of there DO NOT START YOUR BIKE. It means that gas has gone from the tank through the carbs into the cylinder and is now in your oil. Thinned out oil is the devil for bikes. Sounds like you'll need to clean the carbs and set the float bowl height and maybe rebuild the petcock. Check to see if any fuel is coming out when the petcock is turned off. If it only has on pri and reserve then check for gas in the vaccum tube.,,

Nov 10, 2008 | 2003 ATK 605

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