Question about 2002 Yamaha XJR 1300

1 Answer

Fuel leaking out of airbox breather tube , have stripped and cleaned carbs ,thought may be sticking float seemed to run ok for a while but then started leaking again . when oil was drained got close on 4 gall of petrol/oil out of sump.

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 105 Answers

Hello, sounds like you need to set floats in carb, if you have already done that, buy new floats, sounds like one or more of your floats are bad, when you cleaned carbs, did you check and see if any gas was inside the floats, sometimes they will get a pinhole in them, then they will fill with a little gas, and they wont turn gas off, because they cant float in the gas, the carbs are letting gas run through intake down into motor, always turn gas off when not riding your bike that might help a little,

Posted on Feb 01, 2010

Testimonial: "I am very grateful for your advice regarding fuel leak from airbox breather. Would never have thought of pin holes in floats.thank you."


1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

3 Answers

Why won't it idle without choke?

Fuel supply problem somewhere. How is the float adjustment and the float valve? I'd guess the level adjustment is too low.

Mar 28, 2015 | Honda 2005 TRX 400EX

1 Answer

I have a 92 vulcan 500, starting coupla days ago it leaks gas even when the bike is off. the air filter was soaked in gas when i pulled it out. i cleaned it but the gas seems to come from the carb directly...

This sounds like a carb overflowing this normaly occures when the float valve sticks, you will have to remove the bottom of the offending carb, remove and clean the float valve assembly inc seating

Aug 12, 2011 | 1996 kawasaki VN 800 Vulcan Classic

1 Answer

Petrol pissing out through air box bike not starting

hi, you dont say what bike this is, however the main reason for this would be at least 1 float valve not closeing, has the bike stood for a while, classic symptom, reason for not starting would be overfueling, normaly you will find a drain screw on each carb with a pipe for fuel to overflow, this would then be oviouse which carb is giving the problem as the fuel flows out of the problem carb overflow, your overflow tubes which are located inside the float chamber may be blocked, i would think that in this case a strip down of the carbs to check and clean as ness would be in order, in the same way the fuel will run out through the airbox it will also run into the engine, causing it not to run

Feb 13, 2011 | kawasaki GT 750 Motorcycles

2 Answers

Fuel leaking out of air intake

hello, you may need to check float in carb, could be sticking or bad, make sure plugs aren wet with gas insted of oil, you can smell gas fouled plugs, than oil, gas coming out of breather sounds like float needs to be adjusted or floats bad or trash in carb, may have broke ring also

Mar 31, 2010 | 1996 kawasaki VN 1500 Vulcan Classic

1 Answer

Fuel leaking from carb from over flow tube

Sounds like the float is sticking, you can get card cleaner from motor shops that you spray inro the airbox (remove filter first)while running the engine, otherwise you will need to remove and clean the carb. Examine idle and main mixture adjustment screws and O-Rings for cracks and damage. Check inlet needle and seat for condition and proper installation. For detail about carbs check here-->

Dec 22, 2009 | 2000 Yamaha WR 400 F

1 Answer

Gas trickles into airbox and out draintube when parked.

must be floats not high enough the fuel is still running in when the bowl fills with more fuel, adjust a tad more buddy and get back to me

Sep 21, 2009 | 2000 Honda VT 1100 C3 Shadow Aero

1 Answer

Fuel leaking from carb vent tube on newly cleaned carburetor

that would be either the float set to high or the needle and seat is missing an o-ring while you had it apart. Should look at getting a carb kit there only approx. 23 bucks and it would save you a lot of grief in the long run.

Jul 26, 2009 | 1992 Honda CB 750 Nighthawk

1 Answer

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!

Apr 20, 2009 | 1977 kawasaki Z 650

1 Answer

Fuel in airbox

If your particular model has carbs instead of fuel injection, have the shop clean, balance and syncronize the carbs. Done properly, this will fix the problem.

Please rate this solution. Thanks fvg1!

Apr 04, 2009 | 2002 Suzuki GSX 750

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

Not finding what you are looking for?
2002 Yamaha XJR 1300 Logo

560 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers


Level 3 Expert

2600 Answers

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

Answer questions

Manuals & User Guides