Honda CB 350 Four classic motorcycles for sale

History of the Honda CB 350 Four

Launched in the early 1970s, the Honda CB 350 Four stood apart from the mainstream with its compact four-cylinder, four-stroke engine—a rarity in the mid-capacity segment. Honda targeted riders seeking the refinement and engineering quality of their larger models in a more manageable package. Over its production from the early to late 1970s, the CB 350 Four won riders over with its characteristic mechanical smoothness and distinctive appearance. While the direct predecessor was the CB 350 Twin, the CB 350 Four followed the trail of the larger CB 750 Four, making advanced four-cylinder technology accessible to more enthusiasts.

Model history

The model series began in the early 1970s and ran until the late 1970s. The CB 350 Four was Honda's response to the call for a smaller yet technologically advanced motorcycle, using knowledge gathered from the CB 750 Four. Its successor in spirit is the CB 400 Four, which refined the formula further, offering updated styling and performance tweaks. The CB 350 Four remains unique for combining a refined engine with a slim chassis, setting it apart from both its twin-cylinder predecessors and later iterations.

Highlights and unique features

The CB 350 Four’s four-cylinder DOHC engine was exceptional for its class, providing a velvety power delivery unmatched by likewise-sized rivals. Its original 4-into-4 exhaust system is prized by collectors and purists for both its looks and unique sound signature. Many examples remain in original condition or undergo careful restoration, preserving features like the side covers, chassis, and frame—elements keenly sought after. Racing conversions and 'CR181' replicas sometimes utilise lightweight aluminium tanks and unique brake configurations, including optional Fontana drum brakes. The availability of spare parts and the enduring reliability of Honda engineering make ownership particularly attractive.

Technical data

Special Editions and Collectible Models

While the original CB 350 Four is the primary reference, several race replica builds and custom transformations exist. Notable examples include the CR181 Replica, which celebrates Honda’s racing heritage with period-accurate modifications such as aluminium tanks and special brake solutions. Conversion parts and accessory packages allow enthusiasts to create unique, collectible variants tailored to both street and track use.

Weak Spots and Common Issues

No significant problematic areas are widely documented for the Honda CB 350 Four. The model is renowned for its durability and reliability. Routine checks should focus on ensuring originality of side covers, exhaust system, and correct brake operation depending on model year and conversion history. Spare parts are generally easily available, and original documents often accompany sales from private sellers and specialist dealers.

Engine and Performance, Transmission and Handling

The CB 350 Four’s engine delivers a particularly refined running culture. With a 5-speed gearbox, the bike offers smooth shifting and effortless power delivery, especially notable in city and country riding. The chassis is stable, with handling benefitting from period upgrades such as Koni shocks. Depending on configuration, front disc or even special drum brakes provide reliable stopping power. In its 'race replica' guises, handling and braking performance are further enhanced by lightweight aluminium parts and racing brake assemblies. - Honda CB 350 Four (standard, original configuration)

• Honda CB 350 Four CR181 Replica (with racing conversion)

Interior, Comfort, Exterior and Design

The CB 350 Four’s design is defined by its slim, classic tank profile and the distinctive quartet of chrome exhaust pipes. Original paint schemes, emblems, and aluminium accessories remain key attractions. In custom or race builds, special colours and hand-fabricated components—such as aluminium tanks and Fontana drum brakes—emphasise vintage racing aesthetics. Comfort is typical for classic Hondas: simple, functional, but effective, with the focus clearly on riding enjoyment rather than luxury. Accessories such as custom seat units or rearsets (common in replicas) reflect the enthusiasm for period-correct transformations.

Other features

The CB 350 Four can often be found with original documentation and offered both by private individuals and specialist dealers. Many examples retain original chassis numbers and parts, preserving collectability and authenticity. Good spare parts supply further supports maintenance and preservation. The model is especially popular for those wishing to undertake historic racing or period-correct restoration projects.

Summary

The Honda CB 350 Four stands as a technically advanced and visually striking classic from the 1970s, prized for its engineering integrity and unique four-cylinder character in the medium-displacement class. Genuine examples—whether original, restored or tastefully modified—are highly valued, thanks to easy parts availability and a strong global enthusiast community.