The Legal Gray Zone of High-Powered 'E-Moto' Two-Wheelers

Ariel Rider, an e-bike maker based in Washington state, has opened preorders for the MUDD 72V, a machine it brands as a ‘power bike.’ With a top speed of 105 km/h and an 8,000-watt motor, it visually resembles a fat-tire e-bike but handles like a lightweight electric motorcycle. Yet under current U.S. regulations, it falls into no clear legal category—a gap that regulators have yet to address.

U.S. e-bike rules vary by state, but most follow a three-class system based on speed and motor output. New York, for instance, caps Class 1 and 2 at 32 km/h and Class 3 at 40 km/h, with the latter only allowed in New York City. Anything exceeding these limits is typically reclassified as a moped or motorcycle, requiring registration and a license. Ariel Rider, however, sells the MUDD as an off-road machine for private property, explicitly stating it is not street-legal, thus sidestepping these requirements. This approach exposes a regulatory hole: a two-wheeled vehicle that is too fast for e-bike rules, too off-road for motor-vehicle laws, and not covered by ATV statutes, which usually apply to three or more wheels.

The MUDD is not an isolated case. Chinese manufacturers like Sur-Ron and Talaria have been producing similar lightweight electric dirt bikes for years, and the market is booming. The global dirt-bike market is projected to hit $9.17 billion this year, with electric models the fastest-growing segment. As these machines proliferate, regulators are starting to take notice. New Zealand police have conducted seizures of illegally ridden e-dirt bikes, and New York has proposed legislation to crack down on out-of-class vehicles. Meanwhile, California has enacted a law creating a new category for off-highway electric motorcycles, requiring a Green Sticker for public land use. Other states remain divided: some have comprehensive off-road vehicle frameworks, while others have yet to address the issue, leaving riders in a legal gray zone.

For now, the MUDD and similar vehicles exist in a legal vacuum. Owners who ride only on their own land face no registration or insurance mandates, but they also carry personal liability for any harm caused. As the market grows, policymakers will need to decide whether to create new categories or tighten existing ones, a debate that is already unfolding in states like California and New York.