Honda CB 250 (1978-1981) Review: A Timeless Twin-Cylinder Companion

Introduction

The Honda CB 250, produced between 1978 and 1981, stands as a testament to Honda's golden era of accessible, reliable, and rider-friendly motorcycles. While modern bikes chase horsepower figures and electronic aids, the CB 250 reminds us why simplicity and balanced engineering still matter. This air-cooled twin-cylinder machine isn’t about breaking speed records—it’s about delivering a pure, analog riding experience that connects you to the road. After spending time with a well-preserved example, here’s why this Honda remains a compelling choice for riders seeking classic charm with everyday usability.

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Design & Styling: Understated Confidence

The CB 250’s design is quintessential late-70s Honda: clean lines, a teardrop fuel tank, and a chrome-accented exhaust system that whispers nostalgia without shouting for attention. The twin-cylinder engine sits proudly in the steel double-cradle frame, giving the bike a purposeful stance. At 184 kg (406 lbs), it’s not the lightest in its class, but the weight distribution feels neutral—whether you’re maneuvering through traffic or parked at a café.

The bench-style seat, positioned at a friendly 780 mm (30.7 inches) height, accommodates riders of all sizes, while the analog gauges (speedometer and tachometer) are refreshingly straightforward. Unlike modern digitized clusters, these dials require no interpretation—just a quick glance to stay informed.

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Engine & Performance: Smooth Operator

Powering the CB 250 is a 249cc air-cooled parallel-twin engine, producing 27 PS (20 kW) at 9,000 RPM. While these numbers seem modest, the engine’s character is where it shines. The 180-degree crankshaft delivers a throaty, rhythmic exhaust note, and power builds linearly without abrupt surges.

Key Highlights:
- Torque Delivery: Peak torque arrives at 7,500 RPM, making the bike surprisingly eager in mid-range revs. It’ll comfortably hold 90-100 km/h (56-62 mph) on highways, though overtaking requires patience.
- Fuel Efficiency: With a 14-liter (3.7-gallon) tank and frugal consumption (~30 km/L or 70 mpg), range anxiety is nonexistent.
- Cold Starts: The twin 26mm Keihin carburetors (adjusted to 2 turns out on the air screw) fire up reliably, even after decades of service.

The 5-speed transmission shifts with a satisfying mechanical click, though the clutch can feel heavy in stop-and-go traffic. For urban commuting or weekend backroad adventures, this engine strikes a perfect balance between usability and fun.

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Handling & Ride Quality: Predictably Poised

Honda’s chassis tuning in this era prioritized stability over razor-sharp agility. The 33mm telescopic fork and dual shock absorbers offer 130mm (5.1 inches) of travel—enough to absorb potholes without wallowing. At recommended tire pressures (1.75 bar/25 PSI front, 2.25 bar/33 PSI rear), the bike feels planted, even on uneven surfaces.

Cornering Behavior:
The CB 250 isn’t a canyon-carver, but it holds a line confidently. The 18-inch wheels (front and rear) provide a larger contact patch, inspiring confidence on wet roads. Steering is light at low speeds, making U-turns and parking lot maneuvers stress-free.

Braking:
The single 276mm front disc brake (a rarity in 250cc bikes of this era) offers decent stopping power, though the rear drum requires a firm stomp. Upgrading to modern brake pads or sintered shoes (available at MOTOPARTS.store) can sharpen response.

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Competition: How Does It Stack Up?

The late-70s/early-80s 250cc class was fiercely competitive. Here’s how the CB 250 fared against rivals:

1. Yamaha XS 250

• Engine: Air-cooled parallel-twin, 21 PS.
• Verdict: The Yamaha’s engine vibes noticeably at higher RPMs, and its shaft drive adds weight. The Honda’s chain final drive and smoother power delivery make it more engaging.

2. Suzuki GS250

• Engine: Air-cooled single-cylinder, 24 PS.
• Verdict: The Suzuki’s single-cylinder lacks the Honda’s refinement, though it’s slightly lighter. The CB 250’s twin-cylinder charm wins for long-distance comfort.

3. Kawasaki Z250

• Engine: Air-cooled parallel-twin, 30 PS.
• Verdict: The Kawasaki packs more punch, but its heavier clutch and higher maintenance needs tilt the scales toward Honda’s user-friendly design.

Takeaway: The CB 250’s blend of smoothness, reliability, and ease of maintenance made it a favorite among commuters and touring newbies alike.

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Maintenance: Keeping the Classic Alive

Owning a 40-year-old motorcycle requires diligence, but the CB 250’s mechanical simplicity makes it a joy to maintain. Here’s what to prioritize:

1. Valve Adjustments

• Intake: 0.12 mm (0.0047 in)
• Exhaust: 0.16 mm (0.0063 in)
  Check every 3,000 km (1,864 miles). A valve adjustment toolkit from MOTOPARTS.store simplifies the job.

2. Oil Changes

• Capacity: 2.8L (3.0L with filter) of SAE 10W-40.
• Interval: Every 4,000 km (2,485 miles). Opt for high-zinc formulations to protect the flat-tappet camshaft.

3. Carburetor Tuning

The stock jetting works well at sea level, but if you’re riding in mountainous regions, consider a jet kit (available in-store) to optimize air-fuel mixtures.

4. Chain & Sprockets

The 102-link chain and 15/41 sprocket combo wears predictably. Clean and lubricate every 500 km (311 miles), and replace the chain once elongation exceeds 1%.

5. Brake Fluid

Flush the DOT 4 fluid every two years to prevent moisture buildup. Modern silicone-based fluids offer longer service intervals.

Pro Tip: Keep spare NGK DR8ES-L spark plugs (gap: 0.7 mm/0.028 in) in your toolkit—they’re affordable and critical for smooth cold starts.

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Customization Potential

The CB 250’s aftermarket support is thriving. Popular upgrades include:
- Exhaust Systems: A free-flowing muffler enhances the twin’s exhaust note.
- Seat Kits: Replace the stock bench with a retro-style solo seat for a café racer look.
- Handlebar Risers: Improve ergonomics for taller riders.

MOTOPARTS.store stocks period-correct and modern upgrades to personalize your CB 250 without compromising reliability.

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Conclusion: Why It Still Matters

The Honda CB 250 isn’t just a relic—it’s a reminder of motorcycling’s purest joys. Its twin-cylinder engine, forgiving handling, and minimalist design make it ideal for riders who value mechanical connection over digital intervention. Whether you’re restoring a barn find or seeking a stress-free commuter, this Honda delivers smiles per gallon in spades.

Ready to revive your CB 250? Explore MOTOPARTS.store’s curated selection of OEM-spec parts and performance upgrades to keep your classic running for another four decades.

Words by [Your Name], MOTOPARTS.store Journalist

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