MSD's Blaster FI Controller will improve the performance of your YFZ450!
From the trails to the track, MSD Powersports new Blaster FI fuel and ignition controller delivers unparalleled performance for your YFZ450R & YFZ450X. Select from 10 performance calibrations or create your own custom fuel and ignition curve for any engine configuration.
The MSD Fuel Enhancer is an easy and quick way to modify your factory fuel curve. With four selectable fuel curves available, there is one to meet your ATV's modifications.
Fuel Injection Enhancer kit