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 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] But was eventually introduced in the Nightster in 2022.