Category:
Entry-level Sportbike / Lightweight Motorcycle
Competitors:
Honda CBR250R, Yamaha YZF-R25, Suzuki GSX250R.
Target Audience:
New riders, commuters, track day enthusiasts looking for an affordable and manageable sportbike.
Vehicle Characteristics:
Nimble handling, fuel efficiency, approachable power delivery, sporty styling.
Engine Mechanical:
Complete disassembly, assembly, inspection, and repair of the engine (including cylinder head, pistons, crankshaft, camshafts, valves, oil pump).
Fuel System:
Carburetor tuning and overhaul, fuel tank, fuel pump, fuel lines, fuel filter.
Ignition System:
Ignition timing, spark plugs, CDI unit, ignition coils.
Cooling System:
Radiator, cooling fan, thermostat, coolant flow.
Exhaust System:
Muffler, exhaust pipes, catalytic converter (if applicable).
Transmission:
Clutch operation, gearbox disassembly and assembly, gear ratios, lubrication.
Chassis Frame:
Frame inspection, steering head bearings, alignment.
Suspension:
Front fork service and repair (including oil change and seal replacement), rear shock absorber inspection and adjustment.
Brakes:
Front and rear brake systems, hydraulic fluid replacement, brake pad inspection and replacement, caliper overhaul, master cylinder service.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure, tire wear.
Electrical System:
Wiring diagrams, battery service, charging system (alternator/stator), starter motor, lighting (headlight, taillight, indicators), horn.
Bodywork Fittings:
Fairing removal and installation, seat, fuel tank, fenders, mirrors.
Maintenance:
Routine maintenance tasks, oil changes, filter replacements, lubrication points, periodic checks.
Troubleshooting:
Diagnostic procedures for common issues, symptom-based troubleshooting guides.
Repair:
Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.
Adjustments:
Carburetor synchronization, idle speed adjustment, clutch and brake lever free play adjustment, chain tension adjustment.
Technical Specifications:
Torque values for all fasteners, engine specifications, electrical specifications, fluid capacities, wear limits.
Special Tools:
Identification and usage instructions for specialized tools required for specific repair procedures.
Depth:
Comprehensive; covers basic maintenance to complete engine and gearbox rebuilds, including detailed electrical diagnostics.
Quality:
High-resolution, printable pages.
Searchable:
Yes (standard PDF search capabilities).
Printability:
Yes, all pages are printable.
Operating Systems:
Windows, Mac OS, Linux OS
Software:
Adobe Reader (or compatible PDF viewer).
Engine Type:
4-stroke, DOHC, 4-valve, Parallel-twin
Bore X Stroke:
55.0 x 52.4 mm
Compression Ratio:
11.0:1
Horsepower Approx:
30-32 HP (depending on region and tuning)
Torque Approx:
17-18 lb-ft
Carburetor:
Dual Keihin CVK34 (on most models within this range)
Fuel Tank Capacity:
18 Liters (4.8 US gal)
Oil Type Specification:
API SG, SF, SE, or SH; SAE 10W-40 (check manual for exact specification and viscosity ranges based on temperature).
Oil Change Interval:
Every 6,000 km (3,700 miles) or 6 months, whichever comes first.
Air Filter Cleaning Replacement:
Every 6,000 km (3,700 miles).
Spark Plug Replacement:
Every 12,000 km (7,500 miles).
Coolant Flush Interval:
Every 2 years or 24,000 km (15,000 miles).
Engine Oil Capacity:
1.7 L (1.8 US qt) without filter change; 1.9 L (2.0 US qt) with filter change.
Coolant Type:
High-quality ethylene glycol-based coolant with distilled water (50:50 mix).
Common Wear Items:
Clutch plates, chain and sprockets, brake pads, front fork seals, regulator/rectifier (early models).
Carburetor Issues:
Can become slightly unbalanced or require fine-tuning due to age and usage; potential for phantom electrical draw from regulator/rectifier.
Kawasaki Legacy:
Kawasaki has a long history of producing reliable and performance-oriented motorcycles across various segments.
Ninja 250R Lineage:
The Ninja 250R (EX250 series) has been a staple in Kawasaki's lineup for decades, evolving from earlier iterations to meet market demands and emission standards.
Ex250J Generation:
The EX250-J represents a significant update from previous generations, featuring revised styling, improved aerodynamics, and minor engine refinements.
Manufacturing Location:
Typically manufactured in Thailand for global markets.
