Maintenance & Technical > KX500 Original
89 CDI with 92 Stator
USMC 500:
Two strokes are simple.......unless someone wants to correct me I would have to say that unless your throttle is sticking open there isn't really any fuel issues that would cause a runaway engine. Super lean conditions would cause the symptoms you describe....too much fuel would cause a rich condition which would cause the engine to bog or not run at all.
Gage:
I thought Motorrad said either and air leak or a fuel problem could make the motor runaway. Or a stuck throttle. It just makes more sense that it would be fuel related because I was screwing with the carb all that day, but mostly just jets. Ill definitely do a pressure test on it tomorrow to make sure.
Motorrad:
lean condition will make it run away (low float, pinched fuel line, bad tank vents, clogged petcock, etc etc etc etc_)
Gage:
:-o are you serious, why me.... I have a lot to check. Now I'm really going to be sweating bullets when I start this thing again. One more question, I really appreciate all the help too, Ill try to make habit of searching a little better for things before I ask, If this happens again, whats the best way to stop it! I was thinking flip the choke or hold the brakes down and stall it?
USMC 500:
--- Quote from: Gage on April 20, 2013, 06:19:41 AM --- :-o are you serious, why me.... I have a lot to check. Now I'm really going to be sweating bullets when I start this thing again. One more question, I really appreciate all the help too, Ill try to make habit of searching a little better for things before I ask, If this happens again, whats the best way to stop it! I was thinking flip the choke or hold the brakes down and stall it?
--- End quote ---
Not really that much.....if you pull your carb off and take it apart to clean it you can check all these things right off the bat........to check fuel delievery from the tank I remove the fuel line from the carb and open the petcock letting the fuel pour into a container.....If you have good flow out of the fuel line you can rule out tank vent line, clogged petcock, clogged fuel line.....
While cleaning the carb check you r jets and float level.......I have a carb clean dip can that you can purchase from any auto parts store for like $20. Its pretty much a paint can with a basket. You put your METAL carb parts and housing into the basket and let is sit for a few hours. That usually cleans out any gunk. Then rinse the parts with soapy water then clean water.......Make sure everything is dry before assembly. This is also a perfect time to observe the operation of your throttle and slide to make sure nothing sticks.
Doing these simple things should guarentee that your fuel/air delivery is (before the reeds) is doing what it should........
As far as stopping a runaway motorcycle.........have good access to the plug wire and pull the cap off while wearing a thick rubber glove (voltage rated if possible)......good luck
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