🏷️ Basic Information

Make:

Yamaha

Model:

YZ250F

Year:

2008

Type:

Motocross Motorcycle

Model Code:

YZ250FY

👋 Introduction

Positioning:

The Yamaha YZ250F has consistently been a top contender in the highly competitive 250cc four-stroke motocross class, known for its powerful engine, agile handling, and reliability. This model year represents a significant evolution for Yamaha's motocross platform.

Competitors:

Competes directly with models such as the Honda CRF250R, Kawasaki KX250F, and Suzuki RM-Z250 of the same era.

Features:

Lightweight aluminum frame, potent 250cc liquid-cooled four-stroke engine, advanced suspension components, aggressive styling, and user-friendly ergonomics. The 2008 model year often features refinements over previous iterations.

📋 Manual Details

Areas:

Complete motorcycle coverage

Pages:

Approximately 400+

Type:

Service Repair Workshop Manual

Language:

English

Format:

Downloadable PDF

📖 Manual Coverage

Systems:

Engine, Transmission, Chassis, Suspension (Front and Rear), Brakes (Front and Rear), Fuel System, Ignition System, Electrical System, Cooling System, Lubrication System, Frame, Handlebars, Controls, Bodywork, Wheels, Tires

Procedures:

General Information, Troubleshooting, Maintenance, Engine Removal/Installation, Engine Disassembly/Reassembly, Carburetor Service, Ignition System Checks, Clutch Operation, Transmission Service, Suspension Adjustments and Rebuilds, Brake System Bleeding and Service, Wheel Bearing Replacement, Electrical Component Testing, Wiring Diagrams, Torque Specifications, Specifications Tables, Special Tools Required

Depth:

Comprehensive; covers routine maintenance to complete engine and chassis rebuilds, including detailed diagnostic procedures.

📊 Manual Specifications

Format:

High-resolution, searchable PDF

Quality:

Printable pages with clear, legible text and diagrams

Type:

N/A (Digital Download)

Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

249cc, Liquid-cooled, 4-stroke, DOHC, 5-valve, Single-cylinder

Bore X Stroke:

77.0 mm x 53.6 mm

Compression Ratio:

12.9:1

Horsepower:

Approx. 40-42 HP (at crankshaft, estimated)

Torque:

Approx. 25-27 lb-ft (at crankshaft, estimated)

Carburetor:

Keihin FCR37 (Flat CR) with Accelerator Pump

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Type:

Liquid-cooled, dual radiators

Type:

Wet sump with oil cooler

Type:

CDI (Capacitor Discharge Ignition)

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple-disc

Gear Ratios:

Specific ratios detailed in the manual.

Final Drive:

O-ring sealed chain

Transmission Oil Type:

Yamalube 4 (10W-40) or equivalent SAE 10W-40 API SG or higher.

Transmission Oil Capacity:

0.65 L (0.69 US qt)

📐 Dimensions

Overall Length:

2170 mm (85.4 in)

Overall Width:

825 mm (32.5 in)

Overall Height:

1280 mm (50.4 in)

Seat Height:

990 mm (39.0 in)

Wheelbase:

1475 mm (58.1 in)

Dry Weight:

97 kg (213.8 lbs)

Wet Weight:

Approx. 106 kg (233.7 lbs)

Fuel Capacity:

8.0 L (2.1 US gal)

Oil Capacity:

0.90 L (0.95 US qt) (without oil filter replacement), 0.95 L (1.00 US qt) (with oil filter replacement)

Front Tire:

80/100-21 51M

Rear Tire:

100/90-19 57M

Front Brake:

Hydraulic disc

Rear Brake:

Hydraulic disc

Front Suspension:

Telescopic fork, 16-way adjustable compression and rebound damping.

Front Suspension Travel:

300 mm (11.8 in)

Rear Suspension:

Monocross, adjustable preload, 16-way adjustable compression and rebound damping.

Rear Suspension Travel:

315 mm (12.4 in)

🛡️ Safety Features

Ratings:

N/A (Motocross bikes are not typically rated by organizations like NHTSA or IIHS)

Features:

Powerful hydraulic disc brakes for responsive stopping power, ergonomic controls for rider confidence.

Features:

Robust frame construction, protective bodywork, high-grip tires for stability.

💡 Technology Features

Features:

N/A (Motocross bikes typically do not feature infotainment systems).

Features:

N/A (Motocross bikes do not feature electronic driver assistance systems).

Features:

N/A (No on-board computer or connectivity features).

Features:

Four-valve cylinder head, 5-valve configuration for improved airflow, liquid cooling for consistent operating temperature, accelerator pump in carburetor for improved throttle response.

🔧 Maintenance

Oil Change:

Every 10-15 hours of riding, or as per manual recommendation. Frequent checks are advised.

Air Filter Cleaning:

After every few rides, or more frequently in dusty conditions.

Spark Plug Inspection:

Every 10-20 hours of riding.

Valve Clearance Check:

Every 15-25 hours of riding, or as specified in the manual.

Engine Oil:

Yamalube 4 (10W-40) or equivalent SAE 10W-40 API SG or higher.

Coolant:

High-quality motorcycle coolant (50% ethylene glycol and 50% deionized water recommended)

Brake Fluid:

DOT 4

Issues:

Some owners reported occasional carburetor jetting issues requiring fine-tuning for optimal performance across different altitudes and temperatures. Clutch wear can be accelerated with aggressive riding. Suspension seals can be prone to leaks if not maintained. Regular air filter maintenance is crucial to prevent engine damage from dirt ingress.

Oil Filter:

Yamaha P/N 32A-13440-00-00 (Example, verify with manual)

Air Filter:

Yamaha P/N 5SX-14451-00-00 (Example, verify with manual)

Spark Plug:

NGK CR9E (Verify with manual for specific application)

📚 Vehicle History

Heritage:

Yamaha has a long and storied history in motorcycle racing, particularly in motocross, with numerous championships and innovations.

Evolution:

The YZ250F transitioned to a four-stroke engine early in its life, marking a significant shift in motocross technology. Each year typically brings refinements in engine performance, suspension tuning, and chassis design.

Manufacturing Location:

Japan

🏆 Awards & Recognition

Recognitions:

The YZ250F platform, in general, has received numerous accolades and awards from motorcycle publications over the years for its performance and handling characteristics. Specific awards for the 2008 model may vary.