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Themackattack

2009 yz450f Stopped Running.....

10 posts in this topic

I was riding my bike on saturday and it ran fine, went out to use it sunday and nothing... Kicks over fine, and back fires occasonaly. It would start up if i bumped started it down a hill and would run ok but wouldnt idle.

So i changed the air filter, and put in a new plug.

I am stumped on what to do next

If anyone has any info or help please feel free to chim in!

Thanks

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alright, ill take the carb apart and take out the jets and clean em up. Anything else in mind if that dosnt work?

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Cleaned out the carb and same thing, backfired on the first kick then nothing after that......

Any more suggestions? I herd something about the timming chain maybe? How do i adjust that

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Cleaned out the carb and same thing, backfired on the first kick then nothing after that......

Any more suggestions? I herd something about the timming chain maybe? How do i adjust that

Did you remove the pilot jet and clean it or better yet, replace it? If it runs fine other than idle, I don't think it jumped time. Why don't you pull the valve cover and check? I'm still betting a dirty pilot.

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i checked the timing chain and valves and everything is in spec.

I am thinking that it might be the magneto not produceing enough spark to start it as it is back firing and will start if i push it down the hill.

I put fresh gas in it also now.

Anyone else thinkin of what it could be?

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