2008 Yamaha Raptor 250 YFM250RX Service Manual

Complete Yamaha Raptor 250 service manual covering 2008-2009 models. Includes detailed procedures for engine, chassis, electrical, and more. Publication LIT-11616-21-22.

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Document Details

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Document Number / Seller:
26796 / Walter Edwards
File Size:
29.93 MB
File Type:
PDF
Language:
English
Pages:
598
Printable:
Yes
Category:
ATV
Last updated / verified
Feb 15, 2025

Models Covered & Key Technical Specifications

Yamaha Raptor 250 (YFM250RX) 2008-2009 Service Manual

Detailed troubleshooting, parts diagrams, and service data for your Yamaha Raptor 250 ATV.

  • Measured Processing Speed: 1,500 ~ 1,600 r/min establishes the engine idle speed Baseline.
  • Specific Temperature Range: For optimal operation, 55 ~ 65°C defines the coolant limit Requirements.
  • Essential Power Rating: 190 W at 5,000 r/min -- signifies the nominal generator output Threshold.
  • Advanced Memory Capacity: The CDI unit requires 4D3/YAMAHA for standard operation Logic.
  • Core Speed Performance: Maximum compression pressure reaches 1,300 kPa Parameters.
  • Baseline Fuel Capacity: 9.0 L (1.97 Imp gal, 2.37 US gal) dictates the standard fuel tank Volume.

Professional Workshop Service Manual & Technical Specifications

Yamaha Raptor 250 (YFM250RX) Service Manual: 2008-2009 - Precision Maintenance & Repair Guide Powertrain-Manual

Performance-Values: 2008-2009 // Assembly-Group: YFM250RX / Raptor 250 // Architecture-Focus: Engine, Chassis, Electrical

Performance-Element Value Framework
Engine Type Air-cooled 4-stroke, SOHC Engine
Displacement 249 cm3 (15.19 cu in) Engine
Bore x Stroke 74.0 x 58.0 mm (2.91 x 2.28 in) Engine
Front Suspension Double wishbone Chassis
Rear Suspension Swingarm Chassis
Front Brake Type Dual disc brake Brakes
Ignition System DC-CDI Electrical
Starter Motor Output 0.40 kW Electrical

Technical content addresses engine removal, cylinder head service, rocker arm and camshaft inspection, and valve procedures. System operation descriptions cover carburetor adjustments, chassis maintenance, electrical component checks, and troubleshooting guidelines. The documentation addresses rear brake adjustment, tire pressure checks, and wheel inspections. Assembly instructions are detailed for the clutch, oil pump, and starter clutch. Hydraulic schematics are included for the brake system. Steering system component information is provided for tie-rods and knuckles. Drive chain slack adjustment and rear shock absorber settings are documented. The manual also details crankcase disassembly and assembly, crankshaft inspection, and transmission service. Finally, it covers the pickup coil rotor, starter clutch, and shift shaft procedures, along with carburetor inspection and the starter motor. Specs include engine specifications, chassis specifications, and electrical specifications. Detailed tightening torques for both engine and chassis components are provided, along with lubrication points and oil flow diagrams. Cable routing illustrations are included to guide the technician. Torque specifications for critical engine and chassis fasteners are clearly listed. Lubrication points and lubricant types are also clearly defined. Special tools required for servicing the vehicle are also listed.

FAQ

What is the **specific** engine oil capacity for periodic oil changes? keyboard_arrow_down

1.25 L (1.10 Imp qt, 1.32 US qt) is the specified engine oil capacity for periodic oil changes, while 1.35 L (1.19 Imp qt, 1.43 US qt) is required when the oil filter element is replaced.

Specify the **applicable** valve clearance requirements for the intake and exhaust valves. keyboard_arrow_down

0.05 ~ 0.10 mm (0.0020 ~ 0.0039 in) is the specified valve clearance for the intake valve, and 0.10 ~ 0.15 mm (0.0039 ~ 0.0059 in) for the exhaust valve.

What values **designated** for the tire wear limit on the front and rear tires? keyboard_arrow_down

3.0 mm (0.12 in) is the designated tire wear limit for both the front and rear tires.

Calculate the **specific** engine oil pressure at 1,550 r/min. keyboard_arrow_down

3.0 kPa, 0.03 kg/cm2, or 0.44 psi is the specific engine oil pressure at 1,550 r/min.

Assess the **critical** piston-to-cylinder clearance for proper engine operation. keyboard_arrow_down

0.010 ~ 0.025 mm (0.0004 ~ 0.0010 in) is the critical piston-to-cylinder clearance; anything outside this range requires replacing the piston and rings as a set.

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Reviews (3)

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This manual has been invaluable for my maintenance routine. The detailed procedures are easy to follow, and the illustrations make complex tasks manageable. Highly recommend!
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As a mechanic, I found this service manual to be comprehensive and well-structured. The troubleshooting guides are particularly helpful. Plus, the download process was smooth and quick!
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Rated 5 out of 5 stars