The BRG 45 mm throttle body adapter kit takes a set of throttle bodies from the DL 1000 and mounts them, with our adapter plates, to the SV650. Why do we do this? The stock 39 mm throttle bodies limit the top end. If your motor is capable of more horsepower, this will bring it out. It's a complete bolt on kit, all you will need are the throttle bodies off the DL1000, my adapter plates and the instruction manual that comes with it.