Jason Momoa returned to HBO Max’s docuseries *On the Roam* for Season 2’s fourth episode, titled “Off the Grid,” where he rides vintage motorcycles that can switch between electric and gasoline power. The episode, released this week, showcases the work of Electrogenics, a firm that retrofits classic two‑wheelers with modern green‑energy components.

Electrogenics’ dual‑mode retrofit lets 1920s bikes run on battery power

According to the episode, Electrogenics removes the original rear wheel of a 1920s motorcycle and replaces it with a hub that houses a battery pack,enabling silent electric propulsion. Momoa explains that the same hub can accommodate a small gasoline engine, allowing riders to flip a switch and hear the roar of a classic motor again. The company’s approach, described by Momoa in a Collider interview, “takes all these old bikes… you put the batteries on the side and that bike from the 1920s is all E.”

Momoa’s on‑screen adventure blends sustainability with craftsmanship

In the sneak‑peek released by Collider, Momoa and a friend glide through a tree‑lined road,alternating between electric silence and gas‑fueled growl.. He exclaims , “We’ve landed on the moon!” to celebrate the novel riding experience. Momova’s enthusiasm underscores a broader personal mission: preserving historic vehicles while reducing their carbon footprint.

Season 2’s eclectic projects highlight Momoa’s artistic curiosity

Since his return after a two‑year hiatus, Momoa has helped the band The Bobby Lees, collaborated with director Julian Schnabel, and visited Gibson’s garage to restore instruments. Episode 4 adds motorcycle restoration to that roster, and Momoa hints at future segments featuring a classic car and a solar‑panel‑clad boat, expanding the series’ focus on “innovation in transportation that’s less about creating new electric vehicles, and more about preserving the models of the past through electricity.”

What remains unclear about the retrofit’s practicality?

The episode does not disclose the cost of converting a vintage bike or the range of the electric system, leaving viewers to wonder whether the technology is scalable beyond hobbyist projects. Additionally, the long‑term durability of the hybrid hub under regular use has not been tested publicly.

Why the retro‑electric niche is gaining traction

As reported by the show, the retro‑electric movement mirrors a growing consumer desire to blend nostalgia with sustainability. Similar projects have appeared in the classic car world, where electric conversions extend the life of cherished models. Momoa’s high‑profile endorsement may accelerate interest, potentially prompting more manufacturers to explore dual‑mode kits for older vehicles.