Yamaha YZ250F Service Manual Repair 2004 YZ 250F

常规价格: $16.99
促销价: $16.99
常规价格
单价: 单价

🏷️ Basic Information Identification Make: Yamaha Model: YZ250F Year: 2004 Type: Off-Road Motorcycle (Motocross) Codes Vin Prefix: JY 👋 Introduction Market Position Positioning: The 2004 Yamaha YZ250F was a dominant...

29 people are viewing this right now

类型: Motorcycle

斯库: 286416

标签: 2004 Motorcycle Motorcycles Yamaha YZ Models YZ250F

产品多属性

Description

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

YZ250F

Year:

Type:

Off-Road Motorcycle (Motocross)

Codes

Vin Prefix:

👋 Introduction

Market Position

Positioning:

The 2004 Yamaha YZ250F was a dominant force in the 250cc four-stroke motocross class, known for its potent engine and advanced suspension.

Competitive Analysis

Competitors:

Competed directly with models such as the Honda CRF250R, Kawasaki KX250F, and Suzuki RM-Z250.

Key Features

Engine Type:

Liquid-cooled, four-stroke, DOHC, four-valve, single-cylinder.

Suspension Type:

Industry-leading Kayaba SSS (Speed Sensitive System) front forks and rear shock absorber.

Transmission Type:

Constant mesh, 5-speed.

Frame Type:

Aluminum alloy, dual-beam perimeter frame.

📋 Manual Details

Coverage Areas

Engine:

Complete tear down and rebuild

Maintenance:

Scheduled maintenance, inspections

Troubleshooting:

Diagnosis and repair of common issues

Chassis:

Suspension, frame, wheels, brakes

Electrical:

Ignition, lighting, wiring diagrams

Bodywork:

Plastics, seat, fuel tank removal/installation

Page Count

Pages:

Manual Type

Type:

Factory Repair Manual / Service Manual

Language

Language:

English

Format

Format:

Digital Download (PDF)

📖 Manual Coverage

Systems Covered

Engine Mechanical:

Cylinder head, piston, crankshaft, connecting rod, valve train, oil pump, cooling system.

Fuel System:

Carburetor (Keihin FCR MX), fuel tank, fuel lines, petcock.

Ignition System:

CDI, spark plug, ignition coil, timing.

Cooling System:

Radiator, coolant lines, thermostat, fan (if applicable, though unlikely for this model).

Lubrication System:

Engine oil system, oil filter, oil passages.

Exhaust System:

Exhaust pipe, muffler, packing.

Transmission:

Clutch assembly, gear shifting mechanism, internal gears, oil.

Drivetrain:

Drive chain, sprockets.

Suspension Front:

Kayaba (KYB) SSS (Speed Sensitive System) forks, seals, oil, adjustments.

Suspension Rear:

Kayaba (KYB) shock absorber, linkage, bearings, adjustments.

Brakes Front:

Hydraulic disc brake, caliper, master cylinder, brake pads, brake lines, rotor.

Brakes Rear:

Hydraulic disc brake, caliper, master cylinder, brake pads, brake lines, rotor.

Wheels And Tires:

Spoke wheels, hubs, bearings, tire removal/installation, pressure.

Steering:

Handlebars, steering stem, steering bearings, fork guards.

Electrical System:

Wiring harness, connectors, lighting (headlight, taillight, brake light), battery (if applicable, though this is kick-start only).

Frame And Body:

Frame inspection, subframe, fuel tank, seat, fenders, plastics.

Procedures Included

Engine Rebuild:

Complete engine disassembly, inspection of components, replacement of wear items (piston rings, gaskets), reassembly, valve adjustment.

Suspension Service:

Fork seal replacement, fork oil change and level adjustment, shock absorber servicing.

Carburetor Tuning:

Carburetor cleaning, jetting adjustments for altitude and temperature, idle speed adjustment.

Clutch Service:

Clutch adjustment, clutch plate replacement.

Brake Bleeding:

Hydraulic brake system bleeding procedure.

Chain And Sprocket Maintenance:

Chain cleaning, lubrication, adjustment of tension, sprocket inspection and replacement.

Troubleshooting Guides:

Systematic approach to diagnosing common problems like starting issues, poor performance, unusual noises.

Technical Depth

Depth:

Comprehensive - suitable for professional mechanics and experienced DIY enthusiasts. Covers full teardowns and rebuilds.

Torque Specifications:

Detailed torque values for all critical fasteners.

Diagnostic Procedures:

Includes procedures for identifying faults in ignition, fuel, and mechanical systems.

Visual Aids:

Includes pictures and part diagrams to aid in identification and reassembly.

📊 Manual Specifications

File Format

Format:

Searchability:

Searchable text

Print Quality

Quality:

High resolution, suitable for printing

Binding Type

Binding:

N/A (Digital Format)

Paper Type

Paper Type:

N/A (Digital Format)

Navigation

Navigation:

Clickable chapters and internal links

⚙️ Engine Specifications

Primary Engine

Engine Type:

249cc liquid-cooled, DOHC, four-stroke, four-valve, single-cylinder.

Bore X Stroke:

77.0 mm x 53.6 mm

Compression Ratio:

12.5:1

Carburetion:

Keihin FCR MX40 with throttle position sensor (TPS)

Ignition:

Digital CDI

Starting System:

Kick starter

Performance

Horsepower:

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

Torque:

N/A (Manufacturer does not typically publish torque figures for motocross bikes)

Fuel System

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Fuel Tank Capacity:

8.0 liters (2.1 US gal)

🔧 Transmission

Standard

Transmission:

Constant mesh, 5-speed

Features

Clutch:

Wet, multiple-disc, cable-actuated

Final Drive:

O-ring sealed chain, Sprockets (e.g., 14T front / 50T rear - typical configuration)

📐 Dimensions

Exterior

Length:

2170 mm (85.4 in)

Width:

825 mm (32.5 in)

Height:

1280 mm (50.4 in)

Wheelbase:

1475 mm (58.1 in)

Ground Clearance:

355 mm (14.0 in)

Seat Height:

970 mm (38.2 in)

Weights

Dry Weight:

97 kg (213.8 lbs)

Wet Weight:

N/A (Typically not officially published for MX bikes)

🛡️ Safety Features

Ratings

Safety Ratings:

N/A (Motorcycles are not subject to automotive crash test ratings like NHTSA or IIHS)

Active Features

Braking System:

Powerful hydraulic disc brakes front and rear.

Suspension Design:

High-performance Kayaba SSS suspension provides excellent control and stability.

Passive Features

Frame Construction:

Robust aluminum frame designed for durability and handling.

Ergonomics:

Designed for rider control and confidence in aggressive riding conditions.

💡 Technology Features

Infotainment

Infotainment System:

N/A (Motorcycle focused on performance, not comfort/infotainment)

Driver Assistance

Assistance Features:

N/A (Motorcycle focused on rider input)

Connectivity

Connectivity Features:

N/A (Motorcycle focused on performance, not connectivity)

Engine Management

Tps Sensor:

Throttle Position Sensor (TPS) on the Keihin FCR carburetor for optimized fuel delivery.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 10-15 hours of riding or as per manual recommendations (e.g., after significant race events).

Air Filter Cleaning:

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

Spark Plug Inspection:

Regularly, replace as needed based on condition.

Valve Clearance Check:

Every 20-30 hours of riding (critical for performance).

Piston Ring Replacement:

Recommended around 50-100 hours of use, depending on riding style and maintenance.

Suspension Service:

Fork oil and seal replacement every 20-40 hours; shock service as needed.

Fluid Specifications

Engine Oil Type:

Yamalube (or equivalent) 10W-40, API SG, JASO MA or MA2, high-performance 4-stroke motorcycle oil.

Engine Oil Capacity:

1.00 liter (1.06 US qt) without filter change; 1.10 liter (1.16 US qt) with filter change.

Transmission Oil Type:

Yamalube (or equivalent) 10W-30, API SG, JASO MA or MA2, high-performance 4-stroke motorcycle oil.

Transmission Oil Capacity:

0.70 liter (0.74 US qt)

Fork Oil Type:

Kayaba Suspension Fluid (or equivalent) 01 (SAE 2.5W equivalent) - 750 ml per fork leg.

Coolant Type:

High-quality, pre-mixed permanent type antifreeze coolant (50/50 mixture of ethylene glycol and distilled water).

Known Issues

Common Wear Items:

Piston rings, valve seats, clutch plates, wheel bearings, steering bearings, suspension seals are typical wear items on high-performance motocross bikes.

Carburetor Performance:

Proper jetting and cleaning are crucial for optimal performance; sensitivity to altitude and temperature changes.

Valve Train Wear:

Regular valve clearance checks are essential to prevent premature wear and performance degradation.

📚 Vehicle History

Brand Heritage

Yamaha Motorsports:

Yamaha has a long and storied history in professional motocross and off-road racing, dating back to the 1960s.

Model Evolution

Yz250F Progression:

The YZ250F has undergone continuous development, with the 2004 model representing a significant advancement with its introduction of the Kayaba SSS suspension, which set a new industry standard.

Production

Manufacturing Location:

Japan (typically)

Production Years:

2001 - Present (with continuous updates)

🏆 Awards & Recognition

Recognitions

Motocross Magazine Reviews:

The 2004 YZ250F was consistently praised by motocross publications for its powerful engine, class-leading suspension, and sharp handling.

Industry Impact:

The introduction of Kayaba SSS suspension on this model significantly influenced subsequent motocross suspension development across the industry.