After picking myself up off the floor following uncontrollable laughter about the micra I decided I would add useful information about the subject. To raise or remove the limiter you would have to erase or modify the parameters of the ECU. The only part on the engine that can identify engine speed is the crank sensor and you cant change anything on that, If you search around you may find some tuning company out there that will plug in and interogate the ECU and skills dependant, remove or raise it. It is alot easier to fit a new standalone system to be honest. As for the engine taking the revs, they are solid lumps that are seriously over engineered so lets have less of the little 1 litre talk. I have the AUC hitting 9800rpm with big bhp on stock internals, yes they are lightened and profiled but NO problems.