The Honda CM400 is a quintessential example of the late 1970s and early 1980s 'standard' motorcycle movement, blending cruiser aesthetics with the reliable heart of a commuter. It debuted as a more accessible sibling to the CX series, featuring a parallel-twin engine that prioritized smooth power delivery over raw speed. Its distinctive silhouette, marked by a teardrop tank and stepped seat, helped define the era's transition toward the 'American Classic' styling that would later dominate the cruiser market.
Underneath the chrome and modest styling lies an air-cooled 395cc engine that utilizes a 3-valve per cylinder head design. This configuration was somewhat advanced for its time, offering a broader powerband and better efficiency than many of its contemporaries. The bike was offered in several trims, including the CM400T (Tachometer) and the CM400A (Hondamatic), the latter of which featured a unique semi-automatic transmission that appealed to new riders and those seeking a more relaxed experience.
Handling on the CM400 is predictable and friendly, thanks to its relatively low center of gravity and manageable curb weight. While it doesn't possess the sharp geometry of a sportbike, its upright riding position and plush suspension make it an excellent choice for navigating urban environments or leisurely weekend rides. The Comstar wheels, a staple of Honda's design language during this period, provided tubeless tire compatibility—a significant convenience for riders of the era.
Maintenance and reliability are where this machine truly shines. The simple mechanical layout and robust build quality mean that many of these bikes are still on the road today. Parts availability remains decent in the vintage market, making it a favorite for restorers and custom builders who often use the CM400 as a platform for cafe racer or brat-style projects. It remains a testament to Honda's ability to build a motorcycle that is both approachable for beginners and satisfying for veterans.