Honda CB 350 (1968-1974) Review: A Timeless Classic Revisited

Introduction

The Honda CB 350 is a motorcycle that needs no introduction among vintage bike enthusiasts. Produced between 1968 and 1974, this twin-cylinder marvel became a global icon, blending reliability, approachable performance, and timeless styling. Even today, it remains a favorite for riders seeking a classic machine that’s equally at home on backroads or as a canvas for customization. Let’s take a closer look at what makes this generation of the CB 350 special – and why it still captures hearts decades after its debut.

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Design & Styling

The CB 350’s design is a masterclass in simplicity. Its chrome-accented fuel tank, teardrop side covers, and low-slung exhaust pipes exude 1960s charm without feeling overly nostalgic. The upright riding position strikes a perfect balance between sporty and comfortable, making it suitable for both short commutes and longer rides.

At 170 kg (375 lbs), the bike feels light and manageable, even for newer riders. The slim profile and low seat height (around 780 mm/30.7 inches) inspire confidence, while the chrome fenders and round headlamp give it that unmistakable classic appeal. Honda’s attention to detail shines in elements like the embossed tank badges and the polished engine cases – subtle touches that elevate it above purely utilitarian machines of the era.

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Engine & Performance

The beating heart of the CB 350 is its 326cc air-cooled parallel-twin engine, producing 36 PS (26 kW) at 10,500 RPM. While these numbers might seem modest by modern standards, the engine’s character is where it truly shines. The 180-degree crankshaft delivers a distinctive exhaust note – a throaty purr that transitions to a satisfying growl as the tachometer climbs.

Acceleration is smooth rather than explosive, with power building linearly from 3,000 RPM. The bike thrives in the 4,000-8,000 RPM range, making it a joy on twisty roads where maintaining momentum is key. The 4-speed transmission (a 5-speed arrived in later models) features Honda’s signature slick-shifting action, though the neutral-finder between 1st and 2nd gear can be finicky when cold.

Fuel economy is a strong suit, with the 12-liter (3.17-gallon) tank providing over 250 km (155 miles) of range – more than enough for weekend adventures. The air-cooled design keeps maintenance straightforward, though prolonged high-speed runs on hot days can lead to noticeable heat soak.

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Handling & Ride Experience

Where the CB 350 truly excels is in its ride quality. The telescopic front forks and twin shock rear suspension are softly sprung, absorbing bumps with a plushness that modern bikes often sacrifice for sportier handling. At moderate speeds, it feels planted and predictable, though hard cornering reveals the limitations of its period-correct tires and 18-inch wheels.

Braking is handled by a single 180mm drum at both ends. While adequate for casual riding, the lack of bite becomes apparent during aggressive stops or in wet conditions. Many owners opt for upgraded brake shoes or later-model disc brake swaps – a project made easier by the CB 350’s straightforward mechanical layout.

The 17/38 sprocket combination provides lively acceleration off the line, but the engine spins at a buzzy 5,500 RPM at 100 km/h (62 mph). This isn’t a bike for sustained highway use, but on winding secondary roads, it’s an absolute delight.

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Competition

In its heyday, the CB 350 faced stiff competition:

• Yamaha RD350: More powerful (39 PS) with a raucous 2-stroke engine, but required meticulous maintenance and premixed fuel.
• Kawasaki H1 (500cc): A tire-shredding triple-cylinder beast, but notoriously unstable at high speeds.
• Triumph Tiger 350: British charm and superior low-end torque, but plagued by electrical gremlins.

The Honda’s advantage lay in its bulletproof reliability and lower running costs. While not the fastest in its class, the CB 350’s balanced nature made it a better all-rounder – a distinction that remains true today. Modern competitors like Royal Enfield’s Classic 350 inherit its philosophy but lack the raw mechanical authenticity.

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Maintenance

The CB 350’s reputation for reliability hinges on regular upkeep. Here are key considerations:

Valve Adjustments

• Intake: 0.05 mm (0.002 in) cold
• Exhaust: 0.10 mm (0.004 in) cold
  Stick to these clearances religiously – tight valves lead to burnt seats, a common issue in neglected engines.

Oil Changes

Use SAE 10W-40 (1.7 liters/1.8 quarts without filter). The engine’s plain bearings demand clean oil; ignore the 1,500 km (930 mi) interval at your peril.

Carburetion

The stock Keihin carbs respond well to tuning. Start with the air screw 3/4 turns out and adjust based on plug color (NGK B8ES gapped at 0.6-0.7 mm/0.024-0.028 in).

Chain & Sprockets

The 17/38 tooth combo wears evenly if kept adjusted. Replace chains before they reach 1% elongation – a slack chain can crack the engine case.

Brakes

DOT 4 fluid is a must. Modern organic brake shoes from MOTOPARTS.store improve stopping power without requiring drum modifications.

Tires

Stick to period-correct sizes (3.00-18 front, 3.50-18 rear) for handling integrity. Inflate to 1.7 bar/25 psi (front) and 1.9 bar/28 psi (rear).

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Customization Potential

The CB 350’s aftermarket support is staggering. Popular MOTOPARTS.store upgrades include:
- High-flow air filters for sharper throttle response
- LED lighting kits that retain vintage aesthetics
- Progressive suspension springs for improved damping
- Stainless steel exhaust systems that enhance the twin’s voice

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Conclusion

The Honda CB 350 isn’t just a motorcycle – it’s a gateway to motorcycling’s golden age. Its approachable nature invites tinkering, while its robust engineering ensures years of service when properly maintained. Whether you’re preserving a concours example or building a café racer, this is a bike that rewards passion.

At MOTOPARTS.store, we keep these classics on the road with OEM-spec parts and tasteful upgrades. From valve shims to clutch kits, everything you need is just a click away. After all, the best tribute to an icon is keeping it alive – and riding it like Honda intended.

Image 9 Caption: The CB 350 in its natural habitat – a sunny backroad, rider leaning into a gentle curve.

Image 10 Caption: A well-maintained engine bay, showcasing the accessible layout that makes home maintenance feasible.

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Specifications sheet

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