Question about Motorcycles
Starts and runs ok with the choke on full. Dies immediately with choke off.
Check for vacumn leaks, check for cracks on the carby mount.
Can test by spraying water around the carby and listening for a change in engine speed
Posted on Feb 21, 2012
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Posted on Jan 02, 2017
Any water in the gas? Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? ( not all bikes have a water trap bowl ). Drain all the old gas from the tank. Install an in-line fuel filter. You will need to clean the built up varnish from the evaporated gas out of the carbs.
FOR EACH carb > 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 all the little airways and fittings in the carb. Remove the two screws 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. Balance and sync the carbs.
I strongly suggest you to let the shop take care of the carbs. Cleaning can be a nightmare times four and doing the balancing and sync of the carbs sounds easier than it is. If you do the carb work then be sure you have a fire extinguisher at hand. I am serious about that.
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Posted on Mar 29, 2009
hello I am Vortash .. I would say your problem is either blocked idler jets or incorrect fuel mixture ( Air to fuel not correct ) take the bike to your local garage to use their air line unless you have a compressor of your own remove the fuel feed tank side and blow it through with the airline if this don't cure it you will probably need to have the carbs tuned to manufacturesr spec's , If you are more mechanicaly minded strip the idler jets out pass a fine strip of wire through them and replace .You can also get this problem if you have an air leak on the maniflod or the carb bowl etc hope this helps regards Vortash
Posted on May 14, 2009
Fuel filter is located near the fuel shutoff valve within three inches. It is inline between the shutoff valve and the fuel pump (towards tank).
The fuel circuit is: Tank/Fuel Pump/Fuel Filter/Fuel Shut-off Valve/Carbs.
You first step is to check for fuel delivery to the filter. Make sure the bike is cool and no iginition sources are nearby. Disconnect the inlet line at the filter and turn key on and crank engine (to trigger fuel pump.) Do not try and start at this time (choke off).
If fuel is adequate to the filter, check the filter by blowing through it, it should easily pass air. Replace filter if questionable.
Next reconnect the fuel lines and remove float bowl drain plugs in the back of the carbs (2 per carb). If with key on and cranking fuel pours out of these ports then you probably have clogged fuel jets. If not then the float bowl needles / pipes could be plugged with varnish from dried fuel. You can try spraying carb cleaner into the fuel inlet to clear the varnish and then retest. Careful not to spray carb cleaner on yourself (wrap straw with a rag).
If you have good fuel flow to the carbs and bowls you probably have varnish plugging the jets. You should remove the carbs and clean them thoroughly.
Hope this helps,
Posted on May 18, 2009
SOURCE: yamaha warrior won't start
a yamaha warrior isnt a 2 stroke. they make a street bike nad a four stroke quad. Check your carburator. check your spark plug and check your stator. it may be very minor considering it was running fine then just went out. no noise or anything. you would have heard something if you broke something internal.
Posted on May 21, 2009
You will most likely find that your Air Cleaner element is blocked & possibly may have sucked up some leaves reducing air flow.
Posted on Jun 20, 2009
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