2011 yz450 Hesitation at full Throttle

5 replies to this topic
  • JLB943

Posted October 21, 2014 - 08:09 AM


I am experiencing hesitation when going to full throttle. The bike breaks up / sputters.  I changed the fuel pump and filter but this did not correct the issue. I have purchased a new spark plug. Any other suggestions on what could be causing the issue?

  • grayracer513

Posted October 21, 2014 - 09:15 AM


Any fault codes?

  • JonDirt

Posted October 21, 2014 - 10:30 AM


Rev limiter? 

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  • JLB943

Posted October 21, 2014 - 01:44 PM


No fault codes. I was expecting there to be, but the tuner does not show anything.

Is the rev limiter part built into the ECU or a separate item? How would you troubleshoot an issue with this?

Edited by JLB943, October 21, 2014 - 01:45 PM.

  • grayracer513

Posted October 21, 2014 - 03:02 PM


Yes, the rev limiting function is built into the ECU.  If the limiter kicks in, though, it doesn't sound like a misfire or sputtering, it's off-on-off-on-off-on in rapid, regular fashion.  Your problem sounds like the kind of thing that a bad plug might do.  Don't over think things just because it's EFI.

  • JLB943

Posted October 27, 2014 - 06:03 AM


New plug seems to have solved the problem.

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