Eprom chips for electronic ignition management systems of motorbikes (made by Fast by Ferracci - USA)

They replace original Eprom to increase engine performances, in case of modifications.
Eprom chips allow increased fuel delivery and rev limiters, ignition timing adjustments, and improved power curves for noticeable performance gains. 

Stage 2 is used in case of substantial modifications to the engine.
With these Eprom, both unleaded and super petrol can be used.
If you have the proper tools, we advise to reset the CO percentage of exhaust to 3-3.5.