400 ex problem

lil_Mrs._Honda1 · April 18, 2005, 03:03:24 PM

flyin down a trail saturday and all of a sudden start loosing power Im on the gas get getting NOTHING, then it dies but starts right back up but every time I start letting out clutch it sputters and starts to go and then dies! so I get off start kickin it and cussing it then a few minutes it runs well enough to get it back to the trailer but just not running like it should.
what do ya think?

Old_School · April 18, 2005, 04:07:19 PM

Sounds like there is an object in the bowl of the carb. I had a poppy seed in the bottom of my bowl and once I went full throttle it would bog and die. Started right back up and ran fine til I nailed it. Try to clean the carb out first and see if that works. -Mark

Moose · April 18, 2005, 09:53:27 PM

First be sure the choke is OFF, it's happened to me. :-/
I would then open the drain screw on the bowl and drain some gas out, then try it.

lil_Mrs._Honda1 · April 18, 2005, 10:01:58 PM

choke was off we had been riding for a couple of hours already !

ONEslowEXer · April 18, 2005, 10:06:02 PM

were you riding in water? did you pull your plug? see if you have spark

Moose · April 19, 2005, 01:49:35 AM

Then I would try to drain some gas from the bowl. It also sounds like a clogged filter, or maybe the float is sticking. Definately sounds like a fuel problem.

If the carb is OK, then the easiest thing is to change the spark plug, be sure to check the gap, they don't come set for you.

YamahaWarrior350 · April 19, 2005, 12:33:02 PM

Clean your carb you got some sh** in their that you got to clean out before you damage your engine.

YamahaWarrior350 · April 19, 2005, 12:33:50 PM

Check your sparkplug too