Enable to adjust the amount of fuel injection, ignition timing and etc, to use this ECU with kit wire harness. There are two types of basic control data for the ECU: SB (Superbike) and ST (SuperStock) CD-ROM, software manual and kit manual are included in this set. For SB, use this ECU together with std camshafts and valve springs or with (GYTR) 2CR-12170/12180-70 SHAFT CAM and (GYTR) 2CR-A2110-70 VALVE SPRING and 2CR-1440B-70 AIR FUNNEL SET No other combination is allowed to use. For ST, all the specs related to the engine need to be standard spec.