2011 yz450 Hesitation at full Throttle

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?

Any fault codes?

Rev limiter? 

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

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.

New plug seems to have solved the problem.

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