Maintenance & Technical > KX500 Original

My bike is getting goofy

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c-152:
I have been having trouble with my bike for a little while.  First, it wouldnt stay running during at a race.  It was bogging and stalling a bunch.  Thanks to the help og Hughes and others It reset the mixture screw and it doesnt seem to stall when lugging it.  Now it stalls after I shut of the throttle after a long run at anything over 3/4 throttle.  This useually happens as I am going into a turn.  It then fires right back up on goes fine.  until I go down another straight stretch.  It almost seems like it is running to lean.  I have read a lost of the jetting posts to try and figure it out and have some great info that I am going to mess with however I can help but think it might be the power valve.  It all started to run poorly after I changed the clutch a couple of weeks ago.  I took the side cover off and rechecked the gear and everything looks fine.  Does anyone know how to make sure the exhaust valve is functioning properly.  I know I can check the actuating arm with the little plastic cover off but I do not know anything else.  Let me know your thoughts as I am open for suggestion

Thanks

hughes:
Did or have ever checked the float height? Question for you. If you was to run 3/4 throttle of more and then shut the throttle back to idle does the engine die (not hitting the brakes but letting the bike coast after shutting the throttle down)? I have a bad habit of stalling my bike going into turn to fast and locking up the rear wheel with out any clutch or throttle. Give us the details of what you do when you are coming into a turn.

c-152:
The bike sometimes dies as soon as I pull in the clutch as I am entering the corner even if I am pumping the throttle - like it is out of fuel.  I am going to check the float hieght tonight.  I know what you mean about no clutching and locking the rear wheel up then the bike stalls but this is different.  In fact last sunday I got into the habit of coasting through the corner then clutching and reving the bike out.  It seemed to keep the bike running almost as thought it was running out of fuel from the long run and then the coasting allowed time for the carb to build up more fuel then it would run again.  If I clutched before the turn, it would stall every time after it warmed up.  I would think if the float was set to low then it would also stall during the long run but it doesnt. I am going home to tinker with it tonight and plan on testing it out again this sunday.

hughes:
Sure sounds like some fuel related issue with carb. Keep us informed.

c-152:
Thanks - I will let you know what I find

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