Segment:
High-performance 250cc four-stroke motocross bike
Target Audience:
Motocross racers, off-road enthusiasts, competitive riders
Key Competitors 2013:
Honda CRF250R, Kawasaki KX250F, Suzuki RM-Z250, KTM 250 SX-F
Engine Design:
DOHC, 4-valve, liquid-cooled, four-stroke
Suspension Technology:
Industry-leading Kayaba Speed-Sensitive System (SSS) front forks and rear shock absorber
Fuel Delivery:
Keihin 40mm FCR Flat-Sided Carburetor (prior to fuel injection adoption)
Value Proposition:
Enables DIY repairs and maintenance, saving on professional labor costs
Content Quality:
Manufacturer-produced, high-quality, detailed information
Primary Coverage:
Yamaha YZ250F Motorcycle 2013 Model Year
Secondary Coverage:
General Yamaha MX/Off-road Maintenance & Repair Principles
Estimated Page Count:
Varies (typically 300-500 pages for comprehensive service manuals)
Type:
Workshop Service Repair Manual
Professional Use:
Yes (used by professional technicians, mechanics, and workshops)
Digital Format:
PDF Download
Accessibility:
Readable on any computer (Windows, Linux, Mac), iPad, etc.
Compression:
May be zipped (.zip, .rar), requires unzipping software (WinZip, WinRAR)
Engine:
Complete engine overhaul, internal components, lubrication, cooling system
Fuel System:
Carburetor tuning and overhaul, fuel pump, fuel lines
Ignition System:
CDI unit, spark plug, ignition timing, stator, flywheel
Transmission:
Gearbox inspection, disassembly, reassembly, clutch operation
Suspension:
Front fork (Kayaba Speed-Sensitive System - SSS), rear shock absorber (Monocross), spring rates, damping adjustments, seal replacement
Brakes:
Hydraulic disc brakes (front and rear), caliper overhaul, master cylinder, brake pad replacement, bleeding procedures
Electrical System:
Wiring diagrams, lighting, battery, charging system (if applicable, though primarily kick-start)
Frame And Bodywork:
Chassis inspection, subframe, swingarm, bearings, body panel removal and installation
Wheels And Tires:
Wheel bearing service, spoke tension, tire replacement, rim maintenance
Maintenance:
Routine servicing, oil changes, filter replacements, chain adjustment, general inspections
Troubleshooting:
Diagnostic guides for common problems, symptom-based troubleshooting charts
Repair:
Step-by-step instructions for component removal, repair, and reinstallation
Rebuild:
Complete engine rebuilds, carburetor rebuilds, suspension component overhauls
Diagnostics:
Troubleshooting common performance issues, identifying worn parts
Depth:
Comprehensive (covering everything from basic maintenance to complete engine disassembly and rebuild)
Illustrations:
Yes (clearly illustrated with step-by-step instructions)
Exploded Views:
Yes (detailed component breakdowns, exploded views)
Part Numbers:
Likely includes part numbers for many components within repair procedures
Searchable:
Likely searchable due to PDF format, depending on OCR quality
Printability:
Printable on any computer and printer
Quality Description:
Very best quality
Type:
Digital Download Only (No Hard Copy)
Type:
Not Applicable (Digital)
Digital Storage:
User responsible for saving after download (no lifetime storage provided)
Engine Type:
Liquid-cooled, four-stroke, DOHC, 4-valve
Bore X Stroke:
77.0 mm x 53.6 mm
Compression Ratio:
13.1:1
Cooling System:
Liquid-cooled
Horsepower:
Approx. 40-43 HP (at crankshaft, varies by region and testing)
Torque:
Approx. 27-29 Nm (at crankshaft, varies by region and testing)
Carburetor Type:
Keihin 40mm FCR flat-slide, with TPS (Throttle Position Sensor)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Oil Capacity:
1.10 L (approx.) for crankcase and clutch
Oil Type:
Yamalube 4 (or equivalent JASO MA certified motorcycle oil), SAE 10W-40
Type:
Constant-mesh 5-speed sequential
Clutch Type:
Wet, multi-plate, cable-actuated
Gear Ratios:
1st: 2.167, 2nd: 1.750, 3rd: 1.400, 4th: 1.143, 5th: 0.917
Final Drive:
Chain drive (520 O-ring type)
Safety Standards:
Not applicable for competition/off-road vehicles in the same way as street vehicles.
Braking System:
Hydraulic front and rear disc brakes
Suspension Performance:
High-performance adjustable suspension for stability and control
Chassis Strength:
Durable aluminum bilateral beam frame
Ergonomics:
Designed for rider control and stability
Oil Change:
Every 10-15 hours of riding (or as per manual recommendations)
Air Filter Cleaning:
Before every ride, or as needed based on conditions
Spark Plug Inspection:
Every 20-30 hours of riding
Chain Lubrication Adjustment:
Every 5-10 hours of riding, check tension regularly
Valve Clearance Check:
Every 25-30 hours of riding (critical for performance)
Engine Oil:
Yamalube 4, SAE 10W-40 (JASO MA certified)
Coolant:
Yamaha Yamalube Anti-freeze (or equivalent ethyl glycol based coolant with corrosion inhibitors)
Brake Fluid:
DOT 4 hydraulic brake fluid
Transmission Oil:
Same as engine oil (Yamalube 4, SAE 10W-40)
Common Wear Item:
Clutch plates (due to aggressive riding)
Common Wear Item 2:
Piston rings and cylinder wear (requires regular top-end maintenance)
Common Wear Item 3:
Wheel bearings and steering head bearings
Potential Issue:
Carburetor jetting may require adjustment based on altitude and temperature for optimal performance.