Electrical System Troubleshooting, Fuel System Diagnosis, Engine Performance Issues
Installation Removal:
Engine Removal and Installation, Wheel Removal and Installation, Suspension Component Removal and Installation
Technical Depth
Depth:
Comprehensive, covering everything from basic maintenance to complete engine and chassis overhauls.
📊 Manual Specifications
File Format
Format:
PDF
Searchable Text:
Yes (standard for quality PDF manuals)
Print Quality
Printability:
High (designed for printing specific pages)
Binding Type
Binding:
N/A (Digital Download)
Paper Type
Paper:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Code:
4-stroke, DOHC, 4-valve single cylinder
Displacement:
249 cc (15.2 cu. in.)
Bore X Stroke:
72.0 x 61.1 mm (2.83 x 2.41 in.)
Compression Ratio:
13.2:1
Performance
Horsepower Estimated:
Approximately 37-40 HP (varies based on tuning and dyno)
Torque Estimated:
Approximately 18-20 lb-ft (varies based on tuning and dyno)
Fuel System
Fuel Delivery:
Digital Fuel Injection (DFI) with Keihin 43mm throttle body
Fuel Type:
Unleaded gasoline, minimum 91 octane
Cooling System
Cooling Method:
Liquid-cooled, semi-dry sump lubrication
Ignition
Ignition Type:
Digital CDI
Spark Plug
Recommended Spark Plug:
NGK CR9EIA-9 (check manual for specifics)
🔧 Transmission
Standard
Transmission Type:
5-speed, constant mesh, sequential
Features
Clutch Type:
Wet, multiple-disc, cable operated
Final Drive:
O-ring sealed chain, 13T front sprocket, 48T rear sprocket (standard ratios, check manual for variations)
Fluid Specifications
Transmission Oil Type:
Kawasaki Genuine Motorcycle Oil 10W-40 API SG or SH (check manual for exact specifications and capacities)
📐 Dimensions
Exterior
Overall Length:
Approx. 2180 mm (85.8 in.)
Overall Width:
Approx. 800 mm (31.5 in.)
Overall Height:
Approx. 1270 mm (50.0 in.)
Weights
Curb Weight:
Approx. 104 kg (229.3 lbs)
Fuel Capacity:
6.5 liters (1.7 US gallons)
Wheels Tires
Front Tire:
80/100-21 51M
Rear Tire:
100/90-19 57M
Suspension
Front Suspension Type:
47mm inverted telescopic fork with adjustable compression and rebound damping
Rear Suspension Type:
Uni-Trak with adjustable preload, compression, and rebound damping
Front Wheel Travel:
Approx. 310 mm (12.2 in.)
Rear Wheel Travel:
Approx. 307 mm (12.1 in.)
🛡️ Safety Features
Ratings
Safety Certification:
Not applicable in the same way as street vehicles; designed for closed-course competition.
Active Features
Braking System:
Dual front 300mm petal discs with dual piston calipers, Single rear 240mm petal disc with single piston caliper
💡 Technology Features
Infotainment
Infotainment System:
N/A (Competition Off-Road Motorcycle)
Driver Assistance
Rider Aids:
N/A (Designed for raw performance and rider input)
Engine Management
Efi System:
Digital Fuel Injection provides precise fuel delivery for optimal power and throttle response across the rev range.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 15 hours of operation or annually, whichever comes first (refer to manual for exact details).
Air Filter Cleaning:
Every 6-10 hours of operation or as needed based on conditions.
Spark Plug Replacement:
Recommended every 20-30 hours of operation or as per manual's inspection guidelines.
Chain Adjustment:
Inspect and adjust every 10-15 hours of operation.
Fluid Specifications
Engine Oil Capacity:
Approx. 1.3 liters (1.4 US qt) with filter change (confirm with manual).
Coolant Type:
Kawasaki Coolant (1:1 mixture of demineralized water and ethylene glycol base antifreeze) or equivalent.
Known Issues
Common Wear Items:
Clutch plates, piston rings, valve seats, wheel bearings, steering head bearings, chain and sprockets.
Potential Failures:
Overheating if cooling system is not maintained, premature wear on engine components if oil is not changed regularly, clutch slip under heavy use.
📚 Vehicle History
Brand Heritage
Brand Focus:
Kawasaki Heavy Industries, Ltd. has a long and storied history in motorcycle manufacturing, particularly in performance and off-road segments.
Model Evolution
Kx250F Development:
The KX250F has been a dominant force in the 250cc 4-stroke motocross class, evolving significantly with technological advancements like fuel injection and chassis improvements.
Production
Manufacturing Location:
Japan
🏆 Awards & Recognition
Recognitions
Motocross Achievements:
The KX250F platform has historically been a frequent winner in professional motocross and supercross championships.
Ratings
Magazine Reviews:
Consistently praised by major motorcycle publications for its engine performance and chassis dynamics.