1989-2004 Yamaha YFA1W Breeze 125 Service Manual
Comprehensive service documentation for the Yamaha YFA1W Breeze 125, covering 1989-2004 models. Includes detailed diagrams, specifications, and procedures for all major systems.
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Models Covered & Key Technical Specifications
Yamaha YFA1W Breeze 125 Service Manual: 1989-2004 Integrated Repository & Catalog | Integrated Compendium.
- Prescribed Angular Speed: 1650 rpm establishes the engine idling speed Standards.
- System Enclosure Specs: For optimal operation, 40 mm defines the front brake shoe lining thickness Margin.
- Maximum Native Resolution: The brake drum inside diameter is rated at 130 mm, with a wear limit of 131 mm Protocol.
- Nominal System Volume: The cooling system volume is specified as 1.25 L Architecture.
- Calibrated Consumption Data: The fuel level reaches 2.0 mm below the carburetor body Norms.
- System Travel Rate: The front suspension travel is designed for 110 mm Matrix.
Professional Workshop Service Manual & Technical Specifications
Unified Diagnostic Hydraulic Manual: ATV Official-Issue Yamaha YFA1W Breeze 125 manual for 1989-04 models Calibration-Manual
Performance-Values: 1989-2004 Yamaha YFA1W Breeze 125 // Diagnostic-Area: ATV / System Logic // Performance-Values: Technical-details.
| Specification | Technical-Path | Context |
|---|---|---|
| Model Code | YFA1 (W) | ATV Model Identifier |
| Engine Type | Air Cooled 4-Stroke, SOHC | Engine Configuration |
| Displacement | 124 cm³ | Engine Size |
| Bore x Stroke | 49.0 x 55.0 mm (1.93 x 2.60 in) | Engine Dimensions |
| Compression Ratio | 9.0 : 1 | Engine Performance Ratio |
| Spark Plug Gap | C7HSA (NGK) | Standard Spark Plug Type |
| Transmission | Helical Gear | Gearbox Type |
| Front Brake | Drum Brake | Braking System Type |
| Rear Brake | Drum Brake | Braking System Type |
| Suspension | Swing Axle | Suspension Type |
| Electrical System | CDI | Ignition System Type |
Repair data is categorized into:
GENERAL INFORMATION
This section details machine identification, important information, all replacement parts, gaskets, oil seals, "O"-rings, lock washers/plates, cotter pins, bearings, oil seals, and circlips. Special tools for tune-up, engine service, chassis service, and electrical components are also listed.
SPECIFICATIONS
Provides general specifications including dimensions, weight, engine details, lubrication system, and tire air pressure. Maintenance specifications for the engine, chassis, and electrical components are detailed, along with general torque specifications and definitions of units.
PERIODIC INSPECTION AND ADJUSTMENT
Covers fenders, engine (valve clearance, timing chain, idling speed, throttle cable free play, spark plug inspection, ignition timing, compression pressure, engine oil level/replacement, transmission oil level/replacement, air filter cleaning, carburetor joint, fuel line, crankcase breather hose, exhaust system, V-belt), chassis (front brake, rear brake, drive chain slack, steering system, toe-in, tire inspection, wheel inspection, knuckle shafts, fittings/fasteners, battery), and electrical components (battery, fuse, headlight beam adjustment, headlight bulb replacement).
ENGINE OVERHAUL
Details engine removal, engine disassembly (cylinder head, cylinder, piston, primary and secondary sheave, electric starter drive, shift lever, CDI magneto, timing chain, crankshaft and balancer, camshaft, rocker arm and valve), and engine assembly and adjustment.
CARBURETION
Includes carburetor components, sectional view, removal, disassembly, inspection, assembly, installation, float height adjustment, and fuel level adjustment.
This manual documents torque specifications for engine and chassis components to ensure proper assembly and structural misalignment prevention.
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