1988-2000 Honda NSR125 Service Manual
Complete lubrication system, fuel delivery, cooling, transmission, and hydraulic brake service procedures with factory torque specs, compression values, and carburetor settings.
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Sample pages from the 1988-2000 Honda NSR125 Service Manual manual
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Models Covered & Key Technical Specifications
Honda NSR125 — 1989–2000 Applied Handbook for NSR125 Toolkit.
- Approved Print Quality: 124.8 cm³ (7.62 cu in) is designed for engine cylinder displacement Architecture.
- Baseline Securement Values: For optimal performance, 7.0:1 is measured at compression ratio Framework.
- Verified Liquid Volume: 10.0 liters (2.6 US gal) delivers fuel tank capacity Norms.
- Designated Power Rating: 280 cc (9.4 US oz) indicates fork oil capacity Protocol.
- Certified Working Temperature: Maximum idle speed reaches 1,400 ± 100 min⁻¹ (rpm) Bounds.
- Reference Output Quality: Coolant system is specified as 1.1 liters (1.16 US qt) Topology.
Professional Workshop Service Manual & Technical Specifications
Industrial Service Installation Manual: Motorcycle Comprehensive Repair Guide: Honda NSR125 (1988-200) Knowledge-Base
Engine-Type: Honda NSR (1989) // Reference-Category: Motorcycle Systems / Service Documentation Logic // Engine-Type: Water-cooled 2-stroke engine with detailed specifications.
| Documentation Section | Content Coverage | Technical References |
|---|---|---|
| Engine Systems | Cylinder head, piston, crankshaft assembly documentation | Complete specifications provided |
| Transmission Assembly | Six-speed constant mesh gear documentation | Service limit data included |
| Brake Systems | Hydraulic front and rear brake circuit diagrams | DOT 4 fluid specifications documented |
The documentation is partitioned into comprehensive service sections covering the Honda NSR (1989) motorcycle, documenting the engine and transmission systems, fuel delivery architecture, cooling apparatus, and suspension linkage. Each chapter presents component identification, assembly procedures documentation, and maintenance threshold data. The manual includes lubrication point reference, oil capacity specifications for separate lubrication systems, and carburetor identification data. Fuel system chapters document the PHBH 28 FS carburetor type, reed valve architecture, and float level reference values. Cooling system documentation covers the water-cooled engine with thermostat operation thresholds and radiator capacity data. Transmission service information documents the 6-speed transmission with gear ratio specifications and shift fork assembly procedures. Front and rear suspension chapters include steering head bearing preload requirements and shock absorber spring free length standards. Electrical system documentation references the CDI ignition unit, battery capacity specifications, and charging system component relationships.
Precise Sequences
Maintenance guidelines are included for the oil pump system, documenting the separate lubrication circuit with air bleeding procedures. The document includes torque specifications for critical engine fasteners including cylinder head nuts and crankcase bolts. Clutch system data covers wet multi-plate clutch assembly with disassembly and inspection procedures. Drivetrain documentation references the primary drive gear and balancer assembly with specific torque requirements.
Strategic Parameters
OEM guidelines are included for the cooling system, documenting the 50-50 distilled water and ethylene glycol mixture requirement and reserve tank operation. The manual provides radiator cap relief pressure specifications and thermostat beginning-to-open temperature data. Transmission service information covers the 0.70-liter transmission oil capacity and SAE 10W-40 viscosity specifications. Shift fork assembly documentation includes identification marking procedures and installation sequencing.
Operational Logic-Path
Transmission service information covers all six gear positions with engagement dog wear limits and shift drum groove inspection procedures. The document includes drive chain slack measurement reference values and adjustment nut positioning guidelines. Brake system chapters document hydraulic fluid filling procedures with air bleeding sequences for front and rear master cylinders. Caliper piston and bore diameter service limits are provided for both front and rear brake assemblies.
Diagnostic Protocol
Torque specifications are documented for the rear axle nut to ensure proper oscillation integrity. Front wheel removal procedures reference front axle pinch bolt specifications and fork tube cap tightening data. Rear suspension documentation includes swing arm pivot bolt and shock absorber mounting specifications with preload verification procedures.
Integrated Parameters
The documentation includes cable and harness routing diagrams showing correct wire clamping positions and separation from heat sources. Electrical system wiring includes ignition system schematic showing CDI unit connections, pulse generator circuits, and starter system component relationships. Service data covers battery capacity (4Ah at 12V) and charging system output specifications. The manual documents spark plug gap specifications and ignition coil resistance ranges for diagnostic testing.
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