Sun jammer racing was a sport that involved racing solar wind-driven vehicles called Sun jammers. Popular sun-jammer racing events included the Ursellin Sun Jammer Race and the Chandrilan Cometary Games. Due to bets being placed on sun jammer races (especially at casinos), the races were sometimes fixed.

Annual sun-jammer races were sponsored by the Kendamari Casinos in the Lol sector, attracting gamblers from neighboring sectors to their casinos.