The best hitch we have for fitting RVs like your 2021 Jayco Jay Flight 265TH is the Curt # 13703 which fits standard frame designs that are between 22 and 72 inches apart. It has a 350 lb tongue weight capacity so the weight of your dirt bike and carrier would need to be less than that together. If you needed a carrier the part # UF48-979033 would work great and it is only option approved for use at rear of RV where it's normally a bit rougher. view full answer...