MHR Replica kit isn't that high revving.
MHR Racing, MHR Team, Team2 could get close to 13k revolutions.
And going over 10000 rpm would also require another exhaust (Yasuni R's Powerband reaches it's top near 10000 rpm. MHR rep should aldo dead-end there.)
What variator are you exacly using? (only described as "Polini vari")