Market Position:
The Yamaha Raptor 250 YFM250RX is a popular sport ATV known for its approachable power and nimble handling, often positioned as an entry-to-mid-level performance quad.
Target Audience:
Owners, mechanics, and enthusiasts seeking to maintain, repair, or restore their Yamaha Raptor 250 YFM250RX.
Competitive Analysis:
Competes directly with other 250cc-class sport ATVs from manufacturers like Honda (e.g., TRX250X) and Suzuki (e.g., LT-Z250).
Key Features:
Lightweight chassis, agile handling, reliable 249cc liquid-cooled engine, user-friendly power delivery, suitable for recreational riding and trail use.
Coverage Areas:
Complete, comprehensive coverage for all aspects of the Yamaha Raptor 250 YFM250RX
Page Count:
Exact page count not specified, but implied to be extensive covering all factory procedures.
Manual Type:
Official Factory Service / Repair / Workshop Manual
Manual Purpose:
Designed for the diagnosis, repair, maintenance, and overhaul of the Yamaha Raptor 250 YFM250RX.
Language:
English (presumed, typical for factory manuals sold internationally)
Systems Covered:
Engine (Top End, Bottom End, Lubrication, Cooling, Fuel System), Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Chassis, Bodywork, Maintenance Procedures, Troubleshooting, Diagnostics, Specifications.
Electrical System Coverage:
Detailed wiring diagrams, component testing, troubleshooting for lighting, ignition, starter, and sensors.
Procedures Included:
Routine maintenance, complete engine rebuilds, carburetor tuning and repair, valve adjustments, timing adjustments, clutch service, brake system overhaul, suspension component replacement, electrical system troubleshooting, wiring diagram interpretation, chassis inspections, troubleshooting guides, diagnostic flowcharts.
Carburetor Rebuild And Tuning:
Comprehensive instructions for disassembly, cleaning, inspection, reassembly, and tuning of the Mikuni carburetor for optimal performance and emissions.
Engine Rebuild Details:
Step-by-step guides for cylinder head removal/installation, piston and ring replacement, crankshaft and connecting rod service, bearing replacement, and oil pump maintenance.
Technical Depth:
Factory-level technical depth, suitable for professional mechanics and experienced DIY enthusiasts. Includes detailed disassembly and assembly instructions, torque specifications, tolerances, and diagnostic procedures.
Torque Specifications:
Includes precise torque values for all critical fasteners and engine components.
Special Tools Required:
Identifies any specialized tools or equipment necessary for specific maintenance and repair procedures.
Engine Type:
249cc, Liquid-Cooled, Four-Stroke, SOHC, Four-Valve
Bore X Stroke:
74.0 mm x 58.0 mm
Compression Ratio:
11.2:1
Horsepower:
Approximately 20-22 HP (estimated, as official figures are often not published for ATVs).
Torque:
Not officially published, but designed for responsive low-to-mid-range torque.
Fuel Delivery:
Mikuni BNS30 Carburetor (specific model may vary slightly by year/region)
Ignition System:
TCI (Transistor Controlled Ignition)
Oil Type Specification:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher)
Cooling Medium:
Liquid Cooling
Length:
Approximately 69.1 inches (1755 mm)
Width:
Approximately 45.1 inches (1145 mm)
Height:
Approximately 43.3 inches (1100 mm)
Dry Weight:
Approximately 331 lbs (150 kg)
Ground Clearance:
Approximately 4.4 inches (112 mm)
Front Tire Size:
AT21x7-10
Rear Tire Size:
AT20x10-9
Front Wheel Travel:
Approximately 3.9 inches (99 mm)
Rear Wheel Travel:
Approximately 4.1 inches (104 mm)
Oil Change Interval:
Refer to manual for specific intervals, typically every 20-30 operating hours or annually.
Air Filter Cleaning Replacement:
Inspect and clean regularly, replace as needed based on operating conditions (dusty environments require more frequent cleaning).
Spark Plug Replacement:
Refer to manual, typically every 300-500 operating hours or as performance dictates.
Valve Clearance Adjustment:
Refer to manual, typically every 600-1000 operating hours or annually.
Engine Oil Capacity:
Approximately 1.59 US qt (1.5 L) without filter change, 1.72 US qt (1.6 L) with filter change.
Coolant Type:
Permanent type anti-freeze coolant (50/50 mixture of Yamaha-specific coolant and distilled water recommended).
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for exact specification)
Known Issues:
Common issues can include carburetor gumming if fuel is left standing for long periods, wear on suspension bushings, and potential chain wear if not maintained. The manual will provide detailed troubleshooting for these and other potential concerns.
Brand Heritage:
Yamaha has a long-standing reputation for producing high-performance and reliable recreational vehicles, including a storied history in ATV manufacturing with the iconic Raptor line.
Model Evolution:
The Raptor 250 was introduced as a more accessible and lightweight option within the Raptor family, bridging the gap between smaller utility ATVs and larger, more powerful sport quads. It shares design cues and engineering principles with its larger siblings.
Production Years:
2008 - 2013
