2006-2007 Yamaha YZ250F / YZ250F(V) Owner's Service Manual
Complete 687-page service manual for YZ250F motocross racing machines — specifications, maintenance intervals, engine tuning, chassis suspension, and electrical systems. Publication 5XC-28199-32
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Sample pages from the 2006-2007 Yamaha YZ250F / YZ250F(V) Owner's Service Manual manual
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Models Covered & Key Technical Specifications
Yamaha YZ250F(V) — 2006–2007 Precision Engineering Sourcebook | YZ250F Series Repository.
- Calibrated Displacement Data: 249 cm³ (8.76 Imp oz, 8.42 US oz) is established at the engine cylinder volume Topology.
- Measured Compression Ratio: For optimal ignition timing, 12.5:1 represents the piston chamber pressure Standards.
- Universal Fuel Capacity: Tank volume reaches 7.0 L (1.54 Imp gal, 1.85 US gal) — demonstrates operational fuel reserve Margin.
- Established Valve Clearance: The intake valve requires 0.10–0.15 mm (0.0039–0.0059 in) cold lash adjustment Protocol.
- Published Spark Plug Gap: Electrode spacing is standardized to 0.7–0.8 mm (0.028–0.031 in) for ignition consistency Matrix.
- System Oil Capacity: Total engine oil volume reaches 1.40 L (1.23 Imp qt, 1.48 US qt) full amount Guidelines.
Professional Workshop Service Manual & Technical Specifications
Technical Factory Manual: Motorcycle Yamaha YZ250F(V) - Comprehensive Maintenance & Repair Manual for Owners (2006-2007) Chassis-Documentation
Asset-ID: YZ250F(V) 2006-2007 Competition models // Model-Portfolio: Four-stroke liquid-cooled single-cylinder engine, 249cc, DOHC with constant-mesh 5-speed transmission // Asset-ID: Yamaha OEM service documentation covering complete mechanical and electrical systems.
| System Category | Documentation Scope | Reference Details |
|---|---|---|
| Engine & Drivetrain | Four-stroke DOHC architecture with chain-driven camshaft, primary gear reduction (57/17), secondary transmission via DID520 chain drive (48–49-tooth configurations) | Chapter 4 covers displacement, bore/stroke, compression ratio, valve specifications, clutch assembly, and transmission gear ratios |
| Chassis & Suspension | Telescopic fork with coil spring damping (300 mm travel), monocross link suspension with gas-charged rear shock (310 mm travel), semi-double-cradle frame | Chapter 5 includes steering geometry, brake system architecture, wheel specifications, and component assembly procedures |
| Electrical Systems | CDI magneto ignition with map-controlled advance, ignition coil output voltage, fuel injection throttle position sensor network | Chapter 6 documents stator resistance values, pickup coil specifications, and connector routing diagrams |
Maintenance information covers engine oil selection, coolant capacity specifications, drive chain slack tolerance (48–58 mm), and periodic inspection schedules. Factory specifications are documented for the radiator core (120.2 × 240 × 22 mm), 0.99 L coolant capacity, and water pump assembly. Drivetrain specifications are addressed in the carburetor FCR-MX37 KEIHIN configuration with pilot screw adjustment data, main jet sizing (#178–#175 variants), and cold starter (choke) circuit operation. Valve clearance reference data is included (intake 0.10–0.15 mm, exhaust 0.17–0.22 mm when cold).
Systematic Threshold
The manual documents torque specifications for fasteners spanning frame assembly (28–145 Nm range), engine mounting points, and suspension components. Bolt tightening sequences ensure proper assembly for the crankcase (11 locations), cylinder head (6 fastener positions), and clutch boss (60 Nm specification). Precise specifications are documented for spring free lengths (valve springs 37.81 mm intake, 37.54 mm exhaust; shock absorber springs ranging 245.5–269.5 mm depending on rate marking), piston clearance tolerances (0.030–0.065 mm), and bearing installation procedures with manufacturer mark orientation requirements.
Comprehensive Interface
The document references cable routing diagrams showing fuel tank breather hose installation, coolant circuit pathways, clutch cable positioning (with 8–13 mm free play specification), and throttle cable network management. Component removal sequences follow a logical progression: suspension disassembly, engine extraction procedures, and transmission access points are detailed across Engine, Chassis, and Electrical chapters. Pre-operation inspection checklists include coolant level verification, engine oil verification (measured via sight glass to full mark), fuel quality confirmation, and brake system function testing.
Technical Methodology
Maintenance intervals establish periodic checks: break-in procedures following new assembly, service at 500 km and 1,000 km intervals, and annual component inspections (radiator hose condition, brake fluid degradation, fork seal integrity). The manual documents bearing configurations (taper roller steering head bearings, ball-type wheel hub bearings), seal replacement protocols (oil seal orientation, O-ring material specifications), and lubrication point identification with grease type classification (lithium-soap base for general application, molybdenum disulfide for high-load pivot points). Oil pump specifications include trochoid-type design with 0.12 mm tip clearance maximum, side clearance tolerance of 0.09–0.17 mm, and rotor-to-housing clearance limit of 0.17 mm.
The manual documents torque specifications for the cylinder head mounting (28 Nm specification for 12 × 1.0 studs), ensuring proper bolt stretch prevention and head gasket sealing integrity.
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