Back to Four Square

S6, E3: When a rare British 1950s Ariel Square-Four motorcycle speeds into the shop, the crew goes full throttle to restore this vintage ride. Can Rick take this broken-down bike and make it road-trip worthy? Then, when Ron and Leonard need lessons on how to use the shop's fork-lifts, Tyler makes them practice using giant excavators. But when the master, macho-man Ron, challenges his 98-pound proteg , Leonard, to a big-rig contest, no one's sure who will be student and who will be teacher.