Revolution Max

The Revolution Max is a V-twin motorcycle engine from Harley-Davidson. It features double overhead camshafts and liquid cooling. It debuted in the Pan America adventure bike in February 2021.^[1] Harley-Davidson has announced this engine will eventually come in sizes ranging from 500cc to 1250cc.^[2] A variant of the Revolution Max called the 1250T^[3] saw use in the Sportster S, the first motorcycle under the Sportster nameplate to receive a new engine since 1986.^[4]

A Revolution Max 975T engine

A 975cc version of the engine was announced for an upcoming streetfighter motorcycle called the Bronx, but that bike has been put on hold and may be cancelled.^[5] However, the engine was eventually introduced in the Nightster in 2022.