Question about 1985 Yamaha FJ 1100

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Fuel to second cylinder

Float chamber full fuel not taken into cylinder

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  • Anonymous Mar 19, 2014

    trouble starting when opened drain for float chamber no fuel was present

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  • 292 Answers

Blocked jets. get some spray carb cleaner in there and let it sit overnight

Posted on Apr 12, 2009

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Posted on Jan 02, 2017

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1 Answer

When runing petrol is comeing out of the top of number 2 carb then on low revs it spluters and dies


The carb is flooding because of a stuck needle valve in the float chamber. When the bike is running at higher revs, it is probably drawing enough fuel into the engine to run OK, but at low revs, the overflowing petrol will be getting into the engine in far too higher volume and flooding the cylinder, drowning the spark plug.

You will need to remove the float chamber from the carb, take out the pivot pin that the float hinges on in order to release the needle valve and clean it out. 99% of the time simply dropping the needle valve out, giving it a wipe with a lint free cloth and flushing a little clean petol through the inlet pipe to dislodge any obstruction will fix the problem. While the float chamber is off, check that there is no dirt in the bottom and that the entire chamber is clean and free of any muck.

There will probably be a drain valve on the side of the carb (Usually a brass screw set into the base of the carb float chamber at a slight angle). Before you go to the trouble of removing the carb from the bike, try this:

Turn off the fuel supply.
Put a cup under the carb to catch fuel.
Remove the drain plug and allow the fuel in the float chamber to run out.
Now the float is sitting at its lowest possible position inside the float chamber, turn the fuel supply back on and as petrol runs out of the drain hole, tap the carb sharply and repeadedly with the end of a screwdriver as you let about a pint of petrol flush through.
Turn off the fuel supply and replace the drain plug.

The flushing and tapping MAY dislodge the obstruction that is holding the needle valve open and fix the problem without having to remove the carb

Sep 15, 2011 | 2002 kawasaki ZX-6R

1 Answer

Getting gas in the airbox and out of all the vacumm lines on all carbs???


Hi,

The problem would be the gas float stopper in the carburetor. Fuel kept on flowing even when the gas float chamber is already full.
Better open the carb and check the float valve if it stops the flow of fuel when the float chamber is already filled.
Your mechanic or you can adjust the pin stopper by moving /adjusting the float pin seat.
Hope that helps you out.

Thanks for using FixYa!

Jul 07, 2011 | 1999 Suzuki GSX-R 600

1 Answer

Gasoline in the crankcase starts and runs then within a few seconds gasoline pours out of the air cleaner housing. 200 tw Yamaha


Check if float chamber needle closes correctly in carb. I had a worn needle, that was not closing. When float chamber was full, fuel still flows, and its level reached the air cleaner.
additional advise 1.: check the air cleanerfoam. The fuel probabaly damaged it.
additional advise 2.: When you`ll install new needle, the needle housing tube has sharp edge of the opening. I would recommend to chamfer it, it could scratch the new needle (happened in my case :-((

May 11, 2010 | 2001 Yamaha TW 200

1 Answer

My 2002 Honda Shadow Sabre is leaking gas only when it runs. It pours out of the bottom. Do you have any ideas as to what the problem is?


Your float bowl needle is not closing when chamber is full. Needle is either worn a groove or dirt is caught in seat of the jet. Turn fuel off, remove float bowl and spray some aerosol carby cleaner thru fuel line till comes out bottom. Replace fuel line and hold float bowl up till it stops, (don't push up hard) turn fuel tap back on and if fuel comes out the bottom, your needle or jet seat is worn. If fuel doesn't flow out, your float bowl tab has to be adjusted, bend upwards to decrease chamber capacity. Cheers.

Apr 23, 2010 | 2002 Honda VT 1100 C2 Shadow Sabre

1 Answer

One or both front cylinders not firing and fuel running out of pipe


Hi, Lylejps 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.
8. Damaged petcock diaphragm allowing fuel to flow through the vacuum line into the combustion chamber.
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.
Front cylinders not firing
One cylinder not firing GSX 750
Honda Magna VF750C Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda 1995 VF750C Magna Owner Manual

Feb 25, 2010 | 1998 Honda VF 750 C Magna

1 Answer

I accidently put two stroke gas in the fuel tank and ran it a few seconds, then it quit. Drained the fuel and added new fuel, but will only run a few seconds?


hi because you ran engine and it stopped/failed to restar although you renewed fuel which was 2 stroke ? the wrong fuel will be in carb's float chamber and probably ran engine eventually oiled plug may i suggest you clean plug then clean carb out remove main jet and idle and blow them clear so you can see thro them refit and fill f/chamber to 3/4 full then re assemble carb should start then

Dec 20, 2009 | Garden

1 Answer

Hi i was riding my yamaha yz125 2001 and it cut out now it doesnt have bareley any compression what so ever ! IT WILL NOT START PLEASE HELP :( WHAT DO YOU THINK THIS IS ?


make sure the float did not stick open and flood the cylinder. turn off fuel supply and remove exhaust pipe from cylinder. Does expansion chamber have fuel in it? It shouldnt- drain it. Place a towel over rear of front fender and on floor under exhaust port and kick motor over. Does fuel spray out? If so motor is severely flooded. Keep kicking untiul all fuel is purged from motor. Motor will likely start and run for a second once the fuel is reduced to a level the motor can handle. Reinstal exhaust and fix carb/ float problem. Hope that solves the problem.

Nov 23, 2009 | Yamaha YZ 125 Motorcycles

1 Answer

1984vt 500cc honda shadow back fires on front cylinder engine runs and idles good


Back fire to tht cylinder could be due to lack of gas (fuel) in the float chamber..try to check tht carburator and adjust the float.
Hope this helps!

Oct 23, 2009 | 1984 Honda VT 500 C Shadow

2 Answers

Quit running while driving. Will start but only idles for a few seconds


You'll have to adjust the Idle so that the car will not quit running while driving .because less gas is entering to the engine.after you adjust the Idle then the car can run and not quitting.

Aug 09, 2009 | BMW R 1200 GS Adventure Motorcycles

1 Answer

Yz 426 wont idle, backfires and bogs out


Hello phwolfe,
Did not backfire but , boged out appling fuel. Found it was flooding because
the floats were over filling the chambers. Adjusted float settings (by eye )
problem solved !! Keeping the chambers 1/2 to 3/4 full worked for me.
My Bike is a 1983 Midnight Maxim 653cc. 4 Cylinder. Maybe yours is fuel injected ?

Best of luck !!

Ron



Mar 18, 2009 | 2002 Yamaha YZ 426 F

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