He commissioned an Aqualish droid dealer named Kodin to create a droid that could pilot a swoop bike better than any sentient ever could. With a droid's body, his new pilot could withstand much greater trauma than flesh-and-blood organics, and all of the weighty safety features could be removed from the swoop bike. Even the Hutts were unable to discover a loophole in this arrangement, thanks to the Exchange's rather strict rules concerning "legality" and business enterprises.
Because it was no longer the Exchange's racer anyway, Lupo pulled out from his dealings with them altogether. This had the unfortunate side effect of completely drying up his business, since every potential paying customer became scared of racing against the "unbeatable" droid champion.