LEGO Technic Off-road Racer 42010 by LEGO. $30.50. LEGO Technic Off-road Racer 42010. Pieces:160. Features cool, colorful styling and pull-back motor. Includes the first pull-back motor ever featured in a LEGO Technic building set. Pull back, release and race. ?Combine with the 42011 Race Car for a super-fast Dragster with pull-back motor, adjustable rear wing and opening cockpit.