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Bike wont start after run out of fuel , just back fires

Which side do i bleed first ?

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Hi i don't know what motorcycle you have but some times when you run the bike on to empty all the **** in your tank consolidates in that small amoutn of fuel then its in your carb or carbs. if there is a drain screw on the bottom of the carb open it up and let it drain out that may help.

Posted on Nov 03, 2012

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Posted on Jan 02, 2017

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SOURCE: wont run on prime setting on fuel tap


On most Japanese bikes, the PRI position allows fuel to flow from the tank to the carbs even if the engine is not running. In the ON position, the fuel gate valve would only allow fuel to flow if there is vacuum which of course would mean that the engine is running. There is normally a vacuum hose from the intake manifold of cylinder 1 that leads back to the fuel valve that triggers the internal diaphragm to open the fuel line.

If we are to assume that for some reason the PRI position is blocked, then switching the "fuel tap" to this position would not allow fuel to go down the carbs. Thereafter, the engine used what fuel was left inside the carbs (100 meters) and the engine died. Switching the "fuel tap" back to ON again would not allow fuel to flow down from the tank to the carbs since there is no vacuum and very little vacuum when starting the bike; and the bike would not start, no fuel inside the carbs.

Correct action of course would mean overhauling the "fuel tap" and initially setting it to PRI and then to ON soon as the engine is running on its own. Temporary remedy/workaround would be to manually feed fuel to all the carbs with the use of an external container with rubber hose/fitting. Alternately, you can try spraying starter fluid or car injector cleaner. This should be done with the air cleaner off. A word of caution, in some older bikes I have worked on, this condition would result to an overflow of the carbs soon as the engine starts indicating that the float(s) inside the carbs are sticking.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 11, 2008

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SOURCE: Bike acts as if running out of fuel.but has plenty of fuel

there may be moisture in your carbs if the bike has been idle over ths xmas

Posted on Mar 08, 2009

  • 1 Answer

SOURCE: stalling when starting

if after the two mins ur putting the choke back in and the bike dies, it could be that your needing to adjust the idle speed.
it might just be set on the lower limit so that when ur bike isnt fully warmed up it struggles.

Posted on Mar 16, 2009

  • 47 Answers

SOURCE: i got a 83 gs750 the bike wont start, it turn over

need to tune carb sounds like its flooding check flote lvl in carb bowl and adjust if needed

hope this helps

Posted on Jun 17, 2009

  • 10865 Answers

SOURCE: Bike wont start

Install new spark plugs and add a can of seafoam to your gas at the rate of one ounce per gallon to clean your carbeurator.

Posted on Jul 18, 2009

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