Remapped mine using Dynojet’s newly launched Power Vision 3 for the Gen 2 ST. It allows you to load map files via the OBD2 port beside the accessory power lead next to the battery. The tuning software lets you change all of the ecu parameters such as fuel and ignition maps for each cylinder and each gear, adaptation tables, throttle maps, fuel deceleration cut, fan temperature, ais, o2 sensors, etc. You can develop and load multiple maps into the PV3 unit and flash them on the bike, read and clear fault codes, monitor various parameters (with the unit attached to the bars as you ride) and flash back to stock whenever you want. It’s a great bit of kit for anyone who likes tinkering.
Excellent support from Richard at Dynojet UK who provided an awesome map and answered all my questions very promptly.