Yamaha XJ 600 S Diversion (1984-1991) Review: The Underrated All-Rounder

Introduction

The late 1980s were a golden era for motorcycles that balanced practicality with just enough excitement to keep riders grinning. Enter the Yamaha XJ 600 S Diversion – a machine that quietly perfected the art of being good at everything. While sportbikes screamed for attention and cruisers leaned into nostalgia, the Diversion carved its niche as a steadfast companion for daily commutes, weekend adventures, and even the occasional backroad thrill.

With its air-cooled inline-four engine, upright ergonomics, and no-nonsense design, the XJ 600 became a favorite among riders who valued reliability over flashiness. But does this underdog still hold up decades later? Let’s twist the throttle and find out.

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Design & Styling: Functional Elegance

The XJ 600 S Diversion won’t win beauty contests next to its sleeker siblings, but its design ethos has aged remarkably well. The semi-faired version (post-1989) adds a hint of sportiness with its small headlight cowl, while the earlier naked models embrace a minimalist, utilitarian charm. The 17-liter fuel tank flares outward just enough to give riders a secure grip with their knees, and the analog instrument cluster – featuring a speedometer, tachometer, and basic warning lights – is refreshingly legible.

The seat height of 785 mm (30.9 inches) accommodates shorter riders without feeling cramped for taller ones, and the one-piece saddle strikes a balance between firm support and long-haul comfort. Chrome accents on the exhaust and engine covers add subtle flair, but overall, the Diversion’s aesthetic whispers, “I’m here to work – and maybe have a little fun.”

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Engine & Performance: Smooth Operator

At the heart of the XJ 600 lies a 599 cc DOHC inline-four engine, producing 50 HP at 7,500 RPM and 47 Nm of torque. These numbers might seem modest today, but the power delivery is where this engine shines. The throttle response is linear, with a creamy-smooth surge from 4,000 RPM all the way to its 10,500 RPM redline.

• 0–100 km/h (0–62 mph): ~5.2 seconds
• Top speed: 171 km/h (106 mph)

The six-speed gearbox is a standout feature, allowing riders to keep the engine in its sweet spot whether navigating city traffic or carving through mountain passes. At 100 km/h (62 mph), the engine purrs at a relaxed 6,000 RPM in sixth gear, making highway rides surprisingly serene for a bike of this era.

Air cooling keeps things simple, though sustained high-speed runs on hot days can lead to noticeable heat soak. Still, the engine’s reputation for bulletproof reliability has made it a favorite for budget-conscious riders looking for a low-fuss machine.

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Handling & Ride Experience: Confidence Inspiring

Weighing in at 208 kg (459 lbs) with fluids, the Diversion feels lighter than its specs suggest. The steel diamond frame and conservative steering geometry prioritize stability over razor-sharp agility, making it forgiving for newer riders yet engaging enough for veterans.

Suspension Setup:
- Front: 38 mm telescopic forks (130 mm travel)
- Rear: Dual shocks with preload adjustment (100 mm travel)

The suspension is tuned for comfort, soaking up potholes and uneven pavement without wallowing in corners. Push hard into a bend, and the chassis communicates clearly, though the budget-oriented IRC tires (110/80-17 front, 130/70-18 rear) demand respect on wet roads.

Braking duties are handled by single 267 mm discs front and rear. While adequate for casual riding, aggressive stops require a firm squeeze. Upgrading to sintered pads (available at MOTOPARTS.store) is a worthwhile investment for spirited riders.

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Competition: How Does It Stack Up?

The late ’80s/early ’90s middleweight arena was fiercely competitive. Here’s how the XJ 600 fared against its rivals:

1. Honda CB600F Hornet (Later Model)

• Advantages: More modern liquid-cooled engine, sharper styling.
• Drawbacks: Higher maintenance costs, less comfortable ergonomics.
• Verdict: The Hornet appeals to thrill-seekers, but the Diversion wins for practicality.

2. Kawasaki Zephyr 550

• Advantages: Retro charm, lighter weight (195 kg / 430 lbs).
• Drawbacks: Less power (53 HP but weaker midrange), 5-speed gearbox.
• Verdict: A style-focused alternative, but the Yamaha’s engine is more versatile.

3. Suzuki GSX550E

• Advantages: Sportier demeanor, better suspension.
• Drawbacks: Harsher ride quality, higher vibration at speed.
• Verdict: The GSX is a weekend warrior; the Diversion is an everyday ally.

Conclusion: The XJ 600’s blend of smooth power, comfort, and reliability made it the Swiss Army knife of its class – not the best at any one thing, but impressively competent across the board.

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Maintenance: Keeping the Legend Alive

The XJ 600’s simplicity is a mechanic’s dream, but neglect can turn even this stalwart into a money pit. Here’s what to watch:

Key Maintenance Tips

1. Oil Changes: Stick to a strict 5,000 km (3,100 mi) interval. Use 10W-40 semi-synthetic oil for optimal protection.
2. Valve Adjustments: Check every 10,000 km (6,200 mi). The shim-under-bucket design requires patience but ensures long-term quiet operation.
3. Carb Cleaning: The quartet of Mikuni carbs is prone to gumming if left unused. A fuel stabilizer is a must for winter storage.
4. Chain Care: Clean and lubricate every 500 km (310 mi). A worn chain accelerates sprocket wear – inspect regularly!

MOTOPARTS.store Upgrades

• Brake Lines: Swap to stainless-steel braided lines for improved feel.
• Shock Absorbers: Replace tired OEM units with adjustable aftermarket shocks.
• Seat Comfort: Gel seat inserts reduce fatigue on long rides.

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Conclusion: Timeless Versatility

The Yamaha XJ 600 S Diversion is like your favorite leather jacket – not the flashiest, but impossibly comfortable and always up for an adventure. It’s a bike that asks little and gives much, whether you’re threading through urban traffic, exploring countryside twisties, or simply enjoying the mechanical symphony of its inline-four engine.

While newer bikes offer more tech and power, few match the Diversion’s balance of simplicity and capability. For riders who value substance over trends, this Yamaha remains a compelling choice – and with MOTOPARTS.store’s extensive catalog of upgrades and replacement parts, keeping your XJ 600 in peak condition has never been easier.

Ready to give your Diversion the love it deserves? Explore our curated selection of XJ 600 parts and keep the legend rolling!

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Specifications sheet

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