Question about Yamaha XT 125 R Motorcycles

2 Answers

Yamaha XT 125 R Motorcycles carburetor leaks

Fuel is always leaking from the breather pipe when filling up with fuel

Posted by Anonymous on

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2 Answers

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  • 5 Answers

Clean the floats of the carburetor so it will shut off once it is filled.

Posted on Dec 28, 2016

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  • Yamaha Master
  • 43,050 Answers

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 links below. Good luck and have nice a day.
https://yamahaclub.com/forums/topic/34408-xt-125r-petrol-leak
Carburetor Carb Leaking Gas How to Fix Repair it Motorcycle Honda DIY...
http://gigi600.altervista.org/immagini/xt125r/XT%20125%202005_service.pdf
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xt-owners-manuals

Posted on Dec 27, 2016

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: carbs problem

Remove the fuel line from the carb. Turn the gas on > got flow? If not then clean the fuel line and petcock filter if it has one. Install an in-line fuel filter or replace the present one. Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Use compressed air to assist in cleaning. Is the float needle stuck closed? Be certain the vent tube and vent port are clear.

Please rate this solution. Thanks d_vickers2!

Posted on Apr 20, 2009

  • 3567 Answers

SOURCE: Fuel Leak from the Carburetor

Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Check the float as they can go bad and fill with gas such that they no longer float. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. The idle speed will probably different so adjust the idle screw to get back to where it was. This process should get you back on the road.

Please rate this solution. Thanks!

Posted on Apr 23, 2009

  • 47 Answers

SOURCE: my carburetor is leaking lots of fuel.

it's the float valves either worn got muck in them, most common after bike been laid up for a while, old petrol goes 'gummy' rarely it can be a hold float, so it won't float any more, most unlikely with two gone. if carbs still on bike, hit them with a piece of wood with a hammer, a few moderate taps, that way might free the floats and not damage carbs. failing that it's a strip and clean. if grit and muck in float bowls then drain and clean fuel tank or more **** will just get in.

Posted on Aug 16, 2009

  • 1 Answer

SOURCE: getting gas in breather box/leaks out after shutdown.

I had the same issue, cleaned the gas tank, carbs removed, cleaned and tuned. It helped but still has a rough idle when cold, likely due to a tired float. Best to try cleaning everything first, I had to use a carb guy to get the carbs tuned right for $100 and he remarked on the float not fully functional but I got away with it for a couple seasons. Winterization is essential to keep gas from causing this problem again. Damn ethanol
Cat Scratch

Posted on Aug 24, 2009

  • 29 Answers

SOURCE: leaks fuel out of right side fuel breather hose

Run the engine, then pull the spark plugs out to see which one is wet.

Posted on Jun 25, 2010

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