2006 Yamaha YZ125(W)/W1 Professional Service Manual (575 Technical Pages) Pro Service File
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Sample pages from the 2006 Yamaha YZ125(W)/W1 Professional Service Manual (575 Technical Pages) Pro Service File manual
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Models Covered & Key Technical Specifications
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Yamaha YZ125(W)/W1 (1C3-28199-32) — 2006
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Full Coverage: YZ125W1, YZ125, YZ125W, 1C39, 1C3A, 1C3C.
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Engine Parameters: 54 x 54.5 mm bore and stroke dimensions define the liquid-cooled 2-stroke framework.
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Clearance Data: 0.040–0.045 mm piston-to-cylinder gap ensures thermal stability within the combustion logic.
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Service Tools: YM-91042 clutch holding tool facilitates the removal of the 75 Nm boss securing nut architectures.
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Maintenance Specs: 0.6–0.7 mm spark plug electrode gap maintains ignition integrity through high-tension discharge parameters.
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Fuel Calibration: 9.5–10.5 mm float height measurement above the chamber mating surface stabilizes the induction framework.
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Suspension Settings: 454 mm fork spring free length sustains the primary damping response for closed-course racing logic.
Professional Workshop Service Manual & Technical Specifications
Yamaha YZ125(W)/W1 Owner’s Service Manual (1C3–28199–32)
- YZ125W1 (2006): 0.6–0.7 mm spark plug gap settings regulate the ignition discharge architectures.
- YZ125W (2006): 0.040–0.045 mm piston-to-cylinder clearance defines the primary engine combustion logic.
- YZ125 (2006): 454 mm fork spring free length parameters maintain the front suspension damping framework.
Technical frameworks establish the foundation for precision competition tuning. Professional results depend on the sequential application of factory-specified assembly procedures within the engine and chassis unit.
Navigation through the service sequence structures the repair path by addressing periodic maintenance, engine overhaul procedures, and carburetor jetting adjustments. This technical journey navigates through chassis optimization and sketches the sequence between rear shock spring preload and front fork oil height.
Precise 75 Nm torque calibration logic ensures the operational safety of the YZ125 fleet. Safe repair sequences depend on the 0.6–0.7 mm specifications defined in the technical data to prevent terminal ignition failure. Structural durability remains a core priority during high-stress motocross operations within the racing environment.
| Calibration Matrix | Component | Logic Framework | Data Type |
|---|---|---|---|
| Cylinder Head | Fastener Logic | Torque Spec | |
| Float Height | Induction Parameters | Measurement | |
| Clutch Boss | Engagement Logic | Torque Value | |
| Drive Chain | Tension Parameters | Slack Range |
Service Logic Hub
- Piston ring end-gap architectures
- Crankshaft runout logic
- Fork rebound damping sequences
- Reed valve petal framework
- Transmission shift fork parameters
Operational Safeguards Adherence to specified lubrication sequences prevents premature wear on high-speed rotating components. Every adjustment stage utilizes factory-verified measurement parameters to ensure the machine meets elite performance standards. Maintaining these established technical frameworks protects the structural integrity of the racing chassis during competitive use.
Q: Determine the specific cylinder-to-piston clearance required for the YZ125W1 model. A: 0.040–0.045 mm (0.0016–0.0018 in) measurement defines the critical piston-to-cylinder gap for the 2006 engine framework. Maintaining these exact parameters is mandatory to prevent thermal seizure within the liquid-cooled combustion logic.
Q: Identify the specialized equipment required to remove the clutch boss without damaging the internal drive components. A: YM-91042 or 90890-04086 clutch holding tool architectures are required to secure the assembly for the 75 Nm (7.5 m-kg) removal sequence. Using these forensic tool-IDs ensures the structural integrity of the primary drive gear and friction plate framework.
Q: Verify the searchability and digital navigation features included in this technical technical archive. A: Instant keyword indexing and a hyperlinked table of contents allow mechanics to navigate through the PDF to locate specific 3TNE series engine supplements or wiring diagrams. Access to this 575-page technical documentation is provided via a secure download gateway immediately following the transaction.
Q: Which lubricant type is specified for the front fork oil replacement and tuning? A: Suspension Oil 01 remains the required fluid for the 454 mm fork spring assembly to maintain factory-grade damping response. Calibrating the oil level within the 80–150 mm range allows for precise tuning of the front suspension compression logic.
Q: Locate the spec for the spark plug electrode gap and ignition safety calibration. A: 0.6–0.7 mm (0.024–0.028 in) gap architectures regulate the high-tension discharge between the electrodes to ensure stable 2-stroke firing. Precise adherence to this measurement prevents fouling and maintains the operational safety of the CDI ignition mapping framework.
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