Positioning:
The Yamaha XJ600S Diversion Seca II was positioned as a versatile middleweight sport-touring motorcycle, offering a balance of performance, comfort, and reliability for everyday riding and longer journeys. It was a popular choice for riders seeking a practical and enjoyable motorcycle without the extreme ergonomics of dedicated sportbikes.
Competitors:
Competed against models like the Honda CB600F Hornet, Suzuki GSX600F Katana, Kawasaki GPX600R, and other similarly positioned sport-touring or naked motorcycles of the era.
Features:
Smooth inline-four engine, comfortable riding position, full fairing for wind protection, reliable shaft drive (on some variants, though the XJ600S is chain-driven), accessible performance.
Applicable Years:
1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
Manual Type:
Service Manual / Repair Manual / Workshop Manual
Engine:
Full engine overhaul, disassembly, assembly, lubrication, cooling system, fuel system, ignition system, exhaust system
Transmission:
Clutch, gearbox (5-speed sequential), shift mechanism, lubrication
Chassis:
Frame, suspension (front telescopic forks, rear monoshock), steering, swingarm
Brakes:
Front disc brakes (dual), rear disc brake, brake system maintenance and bleeding
Electrical:
Wiring diagrams, battery, charging system (alternator, regulator/rectifier), starting system, ignition system, lighting, instrumentation, sensors
Fuel System:
Carburetor (Mikuni CV), fuel tank, fuel pump, fuel filter
Cooling System:
Air-cooled engine
Bodywork:
Fairing, body panels, seat, fuel tank, fenders
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, brake pad replacement, spark plug service
Troubleshooting:
Diagnostic charts, common problems and solutions for engine, electrical, and mechanical systems
Repair:
Detailed step-by-step repair instructions for all major components and systems
Overhaul:
Complete engine and transmission overhaul procedures
Adjustments:
Carburetor synchronization, valve clearance adjustment, clutch and throttle cable adjustments
Depth:
Comprehensive; covers everything from basic maintenance to complete engine rebuilds and electrical diagnostics.
Engine Type:
Four-stroke, DOHC, inline-four cylinder
Displacement:
598 cc (36.5 cu in)
Bore X Stroke:
62.0 mm x 49.6 mm
Compression Ratio:
10.0:1
Cooling System:
Air-cooled
Valve Train:
DOHC, 4 valves per cylinder
Horsepower Approx:
60 hp (45 kW) @ 9000 rpm (claimed)
Torque Approx:
51 Nm (37.6 lb-ft) @ 7500 rpm (claimed)
Carburetion:
4 x Mikuni BST34 CV (Constant Velocity) carburetors
Fuel Tank Capacity:
17 Liters (4.5 US gal)
Oil Type:
API SG or higher, SAE 20W-40 motorcycle specific oil recommended
Oil Capacity:
3.2 Liters (3.4 US qt) with filter change
Ignition System:
Digital TCI (Transistor Controlled Ignition)
Spark Plugs:
NGK CR9E or Denso U27ESR-N
Transmission Type:
5-speed, constant mesh
Final Drive:
Chain drive (O-ring sealed)
Clutch Type:
Wet, multiple disc, cable operated
Transmission Oil Type:
API SG, SAE 80W-90 hypoid gear oil or equivalent motorcycle transmission oil
Transmission Oil Capacity:
1.1 Liters (1.2 US qt)
Crash Test Ratings:
N/A (Motorcycles typically do not have standardized crash test ratings like cars)
Brakes:
Front: Dual 298mm discs, Rear: Single 245mm disc
Suspension:
Front: Telescopic forks, Rear: Monoshock swingarm
Lighting:
Halogen headlight, tail light, brake light, turn signals
Instrumentation:
Speedometer, tachometer, fuel gauge, odometer, trip meter, indicator lights
Oil Change Interval:
Every 6,000 km (3,700 miles) or 6 months, whichever comes first
Oil Filter Replacement Interval:
Every 12,000 km (7,500 miles) or 12 months
Air Filter Cleaning Interval:
Every 6,000 km (3,700 miles)
Spark Plug Replacement Interval:
Every 12,000 km (7,500 miles)
Valve Clearance Check Interval:
Every 12,000 km (7,500 miles)
Brake Fluid Replacement Interval:
Every 24,000 km (15,000 miles) or 24 months
Engine Oil:
API SG or higher, SAE 20W-40
Coolant:
N/A (Air-cooled)
Common Issues:
Stalling at low RPM (often carburation/synchronization related), charging system issues (regulator/rectifier failure), aging rubber components (hoses, seals), worn fork seals.
Maintenance Notes:
Regular carburetor cleaning and synchronization are crucial for smooth operation. Ensure proper chain maintenance (cleaning, lubrication, adjustment) to prevent premature wear.
Heritage:
Yamaha Motor Company, founded in 1955, has a long and storied history in motorcycle manufacturing, known for innovation, performance, and reliability across various categories from sportbikes to cruisers and off-road machines.
Evolution:
The XJ600 series originated in the early 1980s. The XJ600S Diversion, introduced in 1991, was a refinement with a full fairing for improved aerodynamics and rider comfort, evolving into the Seca II designation in some markets. It represented Yamaha's effort to create a more comfortable and practical sportbike for broader appeal.
Production Period:
The XJ600S Diversion Seca II model was produced from approximately 1991 to 2003, with the specific generation covered by this manual spanning 1992-1999.
