Posts
76
Joined
4/1/2011
Location
Temecula, CA
US
Edited Date/Time
5/18/2016 10:35pm
Hi Guys,
I am having an issue starting my 2009 YZ 250F.
What I have checked so far:
-Gas was completely drained out of the carb and tank, refilled with gas from yesterday
-Pulled the float bowl off of the carb, cleaned main, pilot and the jet in the bottom of the float bowl.
-When the gas is turned on, fuel comes out of the carb drain (when the screw is opened)
-Valve clearances are all within spec
-Visually checked and verified spark
-Accelerator pump appears to be working
It started for about half a second within the first 10 kicks or so, since then the bike doesn't even try and turn over when kicked, nothing when trying to bump start either.
Tried choke on/off, hot start on/off, opened the throttle while kicking.
Here is the strange part, when we pulled the plug to check for spark it was completely dry. I know the fuel is getting to the float, but it doesn't seem to be getting to the engine.
A little history on the bike:
Last time I rode it the bike ran fine, then it would be extremely difficult to start for the next moto. But run fine again once it got going.
After that it sat for a few months, but I replaced the gas before trying to start it.
Any help would be very appreciated.
Thanks!
I am having an issue starting my 2009 YZ 250F.
What I have checked so far:
-Gas was completely drained out of the carb and tank, refilled with gas from yesterday
-Pulled the float bowl off of the carb, cleaned main, pilot and the jet in the bottom of the float bowl.
-When the gas is turned on, fuel comes out of the carb drain (when the screw is opened)
-Valve clearances are all within spec
-Visually checked and verified spark
-Accelerator pump appears to be working
It started for about half a second within the first 10 kicks or so, since then the bike doesn't even try and turn over when kicked, nothing when trying to bump start either.
Tried choke on/off, hot start on/off, opened the throttle while kicking.
Here is the strange part, when we pulled the plug to check for spark it was completely dry. I know the fuel is getting to the float, but it doesn't seem to be getting to the engine.
A little history on the bike:
Last time I rode it the bike ran fine, then it would be extremely difficult to start for the next moto. But run fine again once it got going.
After that it sat for a few months, but I replaced the gas before trying to start it.
Any help would be very appreciated.
Thanks!
Have you tried starter fluid to see if it will fire up even for a second? If it does then you know you have a fuel supply issue. If it does not then you have other issues as well.
Is your air filter clean and oiled properly?
Are you getting a good strong Bright Blue spark at the plug when you kick it over?
Paw Paw
Since it didn't start on the carb cleaner directly into the intake, we probably have other issues.
The Shop
I have also seen a bad coil act just like this, but the plug would be wet if that was the case.
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