Target Audience:
DIY enthusiasts and professional mechanics working on the 1991 Kawasaki EX250-H2.
Vehicle Segment:
Entry-level sportbike, popular first motorcycle and lightweight track platform
Competitive Advantage:
Lightweight parallel-twin with friendly power delivery, strong aftermarket support, and extensive factory documentation compared to contemporaries like the Honda CBR250 and Suzuki GS250.
Key Features:
Detailed procedures, extensive diagrams, troubleshooting guide, service data, and special tool references.
Value Proposition:
Enables efficient, accurate, and safe repair and maintenance, ensuring reliability and longevity of the vehicle.
Engine Mechanical:
Full disassembly, assembly, inspection, and repair of the engine and its sub-components.
Fuel System:
Carburetor (model specific), fuel pump (if applicable), fuel lines, and tank servicing.
Ignition System:
CDI, spark plugs, ignition coils, and related wiring.
Cooling System:
Heat dissipation related content; this model is air-cooled.
Exhaust System:
Muffler, exhaust pipes, and mounting.
Transmission Drivetrain:
Clutch operation, gear shifting mechanism, chain drive, sprockets, and lubrication.
Chassis Frame:
Frame inspection, alignment, and repair procedures.
Suspension Front:
Front fork assembly, oil seals, springs, damping adjustments, and steering head bearings.
Suspension Rear:
Shock absorber, swingarm, and linkage maintenance.
Braking System:
Front and rear brake systems, master cylinders, calipers, brake pads, fluid, and bleeding procedures.
Electrical System:
Wiring diagrams, battery, charging system (alternator/stator), lighting, horn, starter motor, and fuses.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure, and mounting/dismounting.
Bodywork Trim:
Fairings, fuel tank cover, seat, and other cosmetic components.
Routine Maintenance:
Oil changes, filter replacements, chain adjustments, lubrication, and general inspection.
Troubleshooting:
Diagnostic procedures for common starting, running, and electrical issues.
Disassembly Assembly:
Step-by-step instructions for removing and reinstalling major components and sub-assemblies.
Adjustments:
Carburetor synchronization, valve clearance adjustment, brake lever adjustment, clutch adjustment, and suspension settings.
Rebuilds:
Detailed procedures for overhauling engine components, carburetors, and brake systems.
Special Tool Usage:
Identification and application of specialized tools required for specific repair tasks.
Technical Depth:
Comprehensive, covering from basic adjustments to full engine and component rebuilds.
Diagnostic Information:
Included for effective troubleshooting.
Service Data:
Precise specifications, tolerances, and wear limits are provided.
Illustrations:
Detailed pictorial diagrams, exploded views, and photographs.
Parts References:
Torque specs, wear limits, and service data provided to support correct part fitment and reassembly.
Oil Filter Cross Reference:
K&N KN-111, Hiflofiltro HF111 or OEM equivalent 16097-1001.
Factory Part Number Index:
N/A - this is a service manual, not a parts catalog
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
4-stroke, parallel-twin, DOHC, 2 valves per cylinder
Displacement:
249 cc (249 cubic centimeters)
Bore X Stroke:
55.0 mm x 52.4 mm
Engine Options:
Single engine option for this model year
Horsepower Est:
Approx. 30-35 HP (at crank), depending on specific market tuning.
Torque Est:
Approx. 18-20 Nm (at crank)
Redline:
N/A - refer to manual for exact specification
Carburetion:
Twin Keihin carburetors (e.g., CVK30 or similar)
Fuel Type:
Unleaded gasoline
Fuel Capacity:
N/A - not specified for this model
Oil Type Recommendation:
Kawasaki recommends API SE, SF, SG or SH, JASO MA certified oil. Viscosity typically 10W-40 or 20W-50 depending on ambient temperature.
Oil Capacity W Filter:
Approximately 2.2 - 2.5 Liters (refer to manual for exact specification)
Oil Filter Part Number Example:
K&N KN-111, Hiflofiltro HF111 or equivalent OEM equivalent (e.g., 16097-1001).
Oil Change Interval:
Every 3,000-5,000 km (1,800-3,000 miles) or 6 months, whichever comes first (refer to manual for precise interval).
Chain Lubrication Interval:
Every 500-1,000 km (300-600 miles) or after riding in wet conditions.
Valve Clearance Check:
Typically every 10,000-12,000 km (6,000-7,500 miles) (refer to manual for exact interval).
Air Filter Cleaning Replacement:
Inspection at every oil change, cleaning/replacement as needed based on conditions, typically every 10,000-20,000 km.
Engine Oil:
API SE, SF, SG or SH, JASO MA certified; 10W-40 or 20W-50 depending on ambient temperature
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific recommendation).
Transmission Oil:
SAE 80W API GL-4 (refer to manual for Kawasaki specified oil)
Coolant:
N/A - engine is air-cooled
Common Issues:
Carburetor synchronization drift, aging fuel lines, wear on suspension bushings, potential for stator failure over time.
Preventative Maintenance Emphasis:
The manual stresses the importance of adhering to scheduled maintenance to ensure reliability and prevent costly repairs.
Manufacturer:
Kawasaki Heavy Industries
Kawasaki Heritage:
Kawasaki Heavy Industries has a long-standing reputation for producing reliable and performance-oriented motorcycles across various segments.
Ex250 Evolution:
The EX250 platform, known as the Ninja 250R, has been a staple entry-level sportbike for Kawasaki, undergoing periodic updates in styling and performance since its introduction.
Model Generation:
EX250-H generation, produced from the late 1980s into the mid-1990s
Production Location:
N/A - not specified for this model
Production Period:
The EX250-H2 represents a specific generation of this model line, typically produced from the late 1980s into the mid-1990s.