Question about Harley Davidson XL 1200 C Sportster Custom Motorcycles
I would check the lobe/pump mechanism attached to the crankshaft that pushes on the pump causing it to work. It may have came loose, and/or is defective.
Posted on Apr 17, 2014
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Posted on Jan 02, 2017
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
It's not charging, or the battery won't hold a charge? Get a multimeter and test the generator with the bike running, should be 13.5-14.5 volts. If you get this, you need a battery, if not need to find the bad component in the charging system.
Posted on Mar 08, 2009
Its funny you should mention this but yes, I had its bigger brother the GS 850 G , same problem, Apparently, in my situation I did the same thing and went to the shop and let those butchers make it worse !!!, the way i found my leak was by washing the motor with a grease and oil cleaner , strayed the whole motor and wash it all off totally, then I turn her on and let her get to operating temp went for a few mile and came back and checked it, for me it was the head gasket the guys put on and i forced them to do it again,
I found out later that it was common with the suzi's of that model and ended up doing it myself, I used the original gasket and used a compound called gasket goo and it never leaked through out the 8 years i had it .
But before you do anything , surly they gave you warrant y on the work so take it back and demand they do it properly.
Cheers and ride safe
Posted on May 18, 2009
You cannot bleed the fuel injection system.Test the pump alone (not on the bike) for sufficient fuel supply.Also check the fuel pump relay.
If all that is ok next time you try to crank the engine (only with kill switch on, the fuel pump primes up) with lifted tank and opened air box, spray a bit of carb cleaner spray towards the throttle bodies.It will help.
Posted on Jun 09, 2009
SOURCE: 79 gs550 - uh ohs in wiring...
When you reassembled the bike did you pinch any of the wiring harnesses? Trace the wiring through the bike and make sure everything has a solid connection between their respective power sources and activation switches. Alot of time bikes run wiring under the gas tanks so you need to make sure that you didnt cut anything when pputting it back on (if you removed the tank)
Posted on Jun 15, 2009
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