2012 Wr450 RPM ISSUES

hello all just have a small problem i just did the last step in un corking my 2012 WR450 by power tuning the new ECU to the FMF POWERCORE 4 map Fi setting. the problem that i ran into was while i have my clutch pulled all the way in and give it a shot of throttle i Notice that bike would continue to rev at a very hight RPM until i release the clutch. just wondering what would cause this and i know its not a stuck throttle.

and also when i did my bike i did my buddies bike of the same model and his bike ran perfect

thanks

Menzies 450

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