2010 yz450f wont start


1 reply to this topic
  • lv4snow

Posted May 30, 2014 - 03:03 PM

#1

Bike has always been hard to start (7-8, sometimes more kicks) but after I put in a clean air filter yesterday, I went to start it to warm it up to change the oil but it wouldnt start. Kicked it for 10 minutes and nothing.

Checked plug, it was wet/black with some carbon so I changed it. Checked valves, they were the exact same as last year when I checked them last.
Checked fuel cap vent, it was fine.

Bike has 71 hours on stock top end
Last time I rode was 2 weeks ago with no issues
No codes on the tuner

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  • lv4snow

Posted May 31, 2014 - 02:46 PM

#2

Update: bike started after 3 kicks today shut it off and tried again and won't start. I'm thinking it's a fuel pump issue. How do I troubleshoot fuel pump issues? Besides swapping out with a known good?





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