Segment:
Lightweight to Mid-size Japanese Motorcycle
Competitors:
Honda CB550/CB650, Yamaha XS650, Kawasaki KZ650.
Engine Configuration:
Air-cooled, SOHC, parallel-twin cylinder engine.
Powertrain Layout:
Longitudinal engine crankshaft, chain drive.
Drivability:
Known for a torquey and tractable power delivery suitable for general riding and commuting.
Variants:
Offered in standard (E), semi-faired (EX), custom/cruiser (ST), and sport (TX) variations, catering to different rider preferences.
Covered Years:
1979, 1980, 1981, 1982, 1983, 1984, 1985
Manual Type:
Workshop Service Manual / Repair Manual
Language:
English (Likely, based on typical market distribution)
Engine:
Complete engine overhaul, disassembly, assembly, tuning, lubrication system, cooling system, fuel system (carburetion), ignition system.
Transmission:
Gearbox removal and installation, internal component inspection and repair, clutch operation and maintenance.
Electrical:
Wiring diagrams, charging system (alternator, regulator), ignition system (points, coils, spark plugs), lighting, instrumentation, starting system.
Chassis:
Frame inspection, front forks and steering system maintenance, rear suspension (shocks, swingarm) service, wheel bearing maintenance.
Brakes:
Front and rear brake system service, hydraulic system maintenance, pad/shoe replacement, caliper/master cylinder service.
Fuel System:
Carburetor identification, disassembly, cleaning, adjustment, fuel tank and petcock maintenance.
Maintenance:
Regular servicing, oil changes, filter replacements, chain adjustment, brake fluid checks, tire pressure checks.
Troubleshooting:
Diagnosis of common engine, electrical, and mechanical problems with step-by-step guidance.
Repair:
Detailed instructions for component removal, repair, and reinstallation for all major systems.
Rebuild:
Comprehensive instructions for engine and major component rebuilds.
Depth:
Intermediate to Expert. Covers routine maintenance through complete engine and component overhauls.
Engine Type:
Air-cooled, four-stroke, SOHC, parallel-twin
Displacement:
448 cc (27.3 cu in)
Bore X Stroke:
67.0 mm x 63.4 mm (2.64 in x 2.50 in)
Compression Ratio:
9.2:1 (Typical)
Valve Train:
SOHC, 2 valves per cylinder
Horsepower:
Approx. 40-45 HP @ 8000 RPM (Model Dependent)
Torque:
Approx. 36-39 Nm (26-29 lb-ft) @ 6500 RPM (Model Dependent)
Carburetion:
Twin Mikuni VM26SS or similar downdraft carburetors
Fuel Type:
Unleaded gasoline (premium recommended)
Ignition System:
CDI (Capacitor Discharge Ignition) with breaker points (early models) or fully electronic (later models).
Length:
Varies by model (approx. 2100-2200 mm)
Width:
Varies by model (approx. 750-800 mm)
Height:
Varies by model (approx. 1150-1250 mm)
Dry Weight:
Approx. 170-185 kg (375-408 lbs) (Model Dependent)
Fuel Capacity:
Approx. 17 Liters (4.5 US gallons)
Wheelbase:
Approx. 1430 mm (56.3 in)
Crash Safety Standards:
Not applicable for motorcycles of this era in the same way as cars; safety focus on rider control and braking performance.
Braking System:
Front: Single Disc Brake; Rear: Drum Brake (Some later models may have optional disc brake).
Suspension Performance:
Telescopic front forks, dual rear shock absorbers contributing to stability and handling.
Frame Construction:
Steel tube frame, providing a rigid and stable platform.
Instrumentation:
Analog speedometer, tachometer, fuel gauge (on some models), indicator lights for turn signals, neutral, oil pressure, high beam.
ABS:
Not equipped with Anti-lock Braking System (ABS).
Bluetooth Connectivity:
Not equipped with Bluetooth connectivity.
Oil Change Interval:
Every 3,000 km or 6 months (Refer to Manual for specifics)
Spark Plug Replacement:
Every 6,000 km or 12 months (Refer to Manual)
Valve Clearance Check:
Every 6,000 km or 12 months (Refer to Manual for adjustment procedures)
Chain Lubrication And Adjustment:
Every 1,000 km or as needed
Engine Oil Type:
SAE 10W-30 API SE or SG classification (Refer to Manual for exact grade)
Engine Oil Capacity:
Approx. 2.5 Liters (2.6 US quarts) with filter change
Brake Fluid Type:
DOT 3 or DOT 4 (Check manufacturer recommendation)
Fork Oil Type:
SAE 10W (Refer to Manual for specific grade and quantity)
Carburetor Issues:
Common for older carburetors to clog or require synchronization. Diaphragm wear can also occur.
Ignition System Wear:
Breaker points and condensers can wear and require regular adjustment or replacement on earlier models. CDI units can be prone to failure with age.
Electrical Connections:
Corrosion and loose connections in wiring harness can lead to intermittent electrical faults.
Engine Oil Leaks:
Seals and gaskets can degrade over time, leading to minor oil leaks, particularly around the cylinder head and crankcase.
