Segment:
Lightweight sport motorcycle
Target Audience:
Enthusiasts, DIY mechanics, vintage motorcycle owners
Competitors 1981:
Yamaha RD250, Honda CB250RS
Manual Advantage:
Authoritative and accurate information directly from Kawasaki factory documentation
Vehicle Advantage:
Compact, nimble, and accessible performance in its class
Engine Mechanical:
Engine disassembly, assembly, inspection, repair, tuning, specifications
Fuel System:
Carburetor(s) overhaul, adjustment, fuel tank, fuel lines
Ignition System:
CDI system, ignition timing, spark plugs
Transmission:
Gearbox inspection, repair, clutch operation, service
Chassis And Frame:
Frame inspection, suspension disassembly and repair (front fork, rear shock)
Braking System:
Brake caliper, master cylinder, brake lines, brake fluid replacement
Electrical System:
Wiring diagrams, lighting, charging system, battery, starter motor
Bodywork And Trim:
Body panel removal and installation, seat, fenders, exhaust system
Routine Maintenance:
Oil changes, filter replacement, chain adjustment, lubrication, spark plug checks
Troubleshooting:
Diagnostic charts for common problems and their solutions
Engine Rebuild:
Piston, rings, cylinder, valve train overhaul procedures
Carburetor Tuning:
Idle speed adjustment, jetting recommendations
Electrical Troubleshooting:
Component testing, wiring continuity checks
Depth:
Complete workshop-level repair procedures, including detailed specifications and torque values
Engine Type:
4-stroke, air-cooled, DOHC, parallel-twin
Displacement:
249 cc (249 cm³)
Bore X Stroke:
56.0 mm x 50.6 mm
Horsepower Output Claimed:
Approximately 26-28 hp @ 9,000 rpm (varies by market and tune)
Torque Output Claimed:
Approximately 2.0 kgf⋅m (19.6 Nm; 14.5 lb⋅ft) @ 7,500 rpm (estimate)
Carburetor Type:
Dual Mikuni VM22SS (or similar models, check specific market)
Fuel Capacity:
14 L (3.7 US gal)
Oil Change Interval:
Every 3,000-5,000 km (1,800-3,000 mi) or 6 months
Valve Clearance Check:
Every 6,000-10,000 km (3,700-6,000 mi)
Chain Adjustment Interval:
As needed, typically every 1,000-2,000 km (600-1,200 mi)
Engine Oil Type:
SAE 10W-40 API SE or SF
Engine Oil Capacity:
Approx. 2.4 L (2.5 US qt) with filter change
Brake Fluid Type:
DOT 3 or DOT 4
Common Wear Items:
Carburetor synchronization, worn fork seals, aging electrical components, clutch wear
Engine Specific:
Potential for cam chain noise if not properly tensioned
Brand Origin:
Japan, established 1896 (originally shipbuilding)
Predecessor Inspiration:
Kawasaki's lineage of parallel-twin engines, particularly the KZ series
Design Era:
Early 1980s sportbike styling
Production Period:
Early 1980s (specific years for B1 model)
