Senior and Junior get to work on their big bike build, which reaps surprising results as the two bond over old memories. Meanwhile, PJD starts a trike for Loopster while OCC builds a bike to benefit Senior's favorite charity.

PJD starts a build for technology company QUBX while OCC assembles and unveils a bike for Wildgame Innovations. Meanwhile, father and son continue their collaboration on a re-vamped version of an old school bike.