This will allow full function of your stock gauge set with a Maxx ECU. Coolant gauge, gear indicator (gen2 only), ABC mode indication (gen2 only), FI light all are controlled over the data stream wire on a stock suzuki ECU and don’t work with the Maxx ECU. This adapter will allow that functionality to be returned.
Demo video of how the adapter works https://youtu.be/lk4m-fVVgIs
Video of setting it up in MaxxECU software https://youtu.be/MOgK0msmehY