2012 Husqvarna TXC 310, Motocross 310 priced well below retail. - All-new model for 2012, the 310 displacement comes to the TXC line of race-inspired off-road motorcycles. A bored and stroked version of the 250, the 302 cc fuel-injected four-stroke is a creature all its own capable of providing the best of both worlds ? able to run with the 450s and maneuver with the agility of a 250.