I have a 2015 Polaris 800 Switchback Pro-s . I just completed a complete rebuild of the engine (new crank ,rods , bearings ,pistons , cylinder bore, cylinder head ). All of these parts came as a complete kit. Once assembled the instructions indicate that the fuel mix must be changed from 50:1 to 75:1 and that the ECU must be reprogramed. What tool , cable or program do I need in order to do this ?