1987 Husqvarna WRK 125 Workshop Service Repair Manual Download 87 PDF

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🏷️ Basic Information Identification Make: Husqvarna Model: WRK 125 Year: 1987 Generation Generation Designation: First Generation (MK I) 👋 Introduction Market Position Category: Off-road, Motocross/Enduro (Lightweight Class) Competitive Analysis Competitors:...

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Type: Motorcycle

Vendor:

Sku: 66303

Tags: 1987 Husqvarna Misc Motorcycle Motorcycles WRK 125

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Description

🏷️ Basic Information

Identification

Make:

Husqvarna

Model:

WRK 125

Year:

Generation

Generation Designation:

First Generation (MK I)

👋 Introduction

Market Position

Category:

Off-road, Motocross/Enduro (Lightweight Class)

Competitive Analysis

Competitors:

Competed against models like KTM 125 EXC, Yamaha YZ125, Suzuki RM125, Honda CR125R of the era.

Key Features

Engine Type:

Torquey 125cc 2-stroke, liquid-cooled (check specific model variant, some may be air-cooled, but WRK usually implies water-cooled)

Suspension:

Long-travel suspension for off-road capability, typically featuring adjustable front forks and a monoshock rear.

Handling:

Known for agile handling and maneuverability in technical terrain.

Performance:

Emphasis on tractable power delivery suitable for trail riding and entry-level motocross.

📋 Manual Details

Coverage Areas

Engine:

Complete engine overhaul, internal components, cooling system, lubrication system

Transmission:

Gearbox operation, clutch assembly, shift mechanism, lubrication

Chassis:

Frame, suspension (front forks, rear shock absorber), steering, wheels, hubs

Brakes:

Front and rear brake system servicing, hydraulic components, pad/shoe replacement

Electrical:

Ignition system, lighting, charging system, wiring diagrams, battery maintenance

Fuel System:

Carburetor tuning and overhaul, fuel tank, fuel lines, fuel pump (if applicable)

Exhaust System:

Exhaust pipe and silencer maintenance

Bodywork:

Body panels, seat, fenders, graphics

Maintenance:

Scheduled maintenance, fluid changes, lubrication points

Troubleshooting:

Diagnostic procedures for common issues

Page Count

Estimated Pages:

~200-300

Manual Type

Type:

Workshop Service Repair Manual (OEM Equivalent)

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine System:

Detailed breakdown of the 125cc 2-stroke engine, including cylinder, piston, crankshaft, connecting rod, seals, and gaskets. Specific torque values for critical fasteners.

Cooling System:

Air cooling system analysis, fin cleaning, and general condition checks.

Lubrication System:

2-stroke oil/fuel mixture recommendations, gearbox oil specifications and change intervals.

Transmission System:

6-speed gearbox service, clutch operation and adjustment, shift lever linkage.

Fuel Delivery System:

Dell'Orto PHBH carburetor specifications, jetting, float level adjustment, and cleaning procedures. Fuel filter inspection.

Ignition System:

CDI ignition timing, spark plug specifications (type, gap), and coil testing.

Suspension System:

Front telescopic forks (oil type, level, seal replacement), rear monoshock (pre-load adjustment, damping characteristics).

Braking System:

Front disc brake caliper and master cylinder service, rear drum brake adjustment and shoe replacement. Hydraulic fluid type (DOT 3/4).

Electrical System:

Wiring diagrams for all electrical components, including lighting, horn, and kill switch. Battery specifications and charging system diagnosis.

Procedures Included

Engine Rebuild:

Complete engine disassembly, cleaning, inspection, and reassembly with replacement part recommendations.

Carburetor Tuning:

Step-by-step guide for adjusting air-fuel mixture, idle speed, and throttle response.

Suspension Servicing:

Fork seal replacement, fork oil change, rear shock absorber adjustments.

Brake Maintenance:

Brake fluid bleeding, pad/shoe replacement, caliper/drum servicing.

Electrical Diagnostics:

Troubleshooting common electrical faults using wiring diagrams and multimeter testing.

Wheel And Tire Service:

Tire pressure recommendations, wheel bearing maintenance, spoke tensioning (if applicable).

Cleaning And Lubrication:

Points for regular cleaning and lubrication of moving parts.

Troubleshooting Guides:

Problem-solution tables for ignition, fuel, starting, and running issues.

Technical Depth

Depth:

Comprehensive OEM-level detail for DIY repairs, professional mechanics, and in-depth understanding of the machine.

📊 Manual Specifications

File Format

Format:

PDF (Portable Document Format)

Searchable Text:

Yes (typically, depending on the scan quality)

Print Quality

Quality:

High-resolution scans for clear text and diagrams

Binding Type

Type:

Digital Download (Not a physical product)

Paper Type

Type:

N/A (Digital)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Two-stroke, single-cylinder

Displacement:

123.5 cc (approx.)

Bore X Stroke:

54 mm x 54 mm (typical for this era and displacement)

Cooling System:

Liquid-cooled

Carburetor Model:

Dell'Orto PHBH 28 AS (common fitment)

Ignition:

CDI (Capacitor Discharge Ignition)

Compression Ratio:

Typically around 7.0:1 to 8.0:1 (check manual for exact spec)

Performance

Horsepower:

Approx. 25-30 HP (estimate, actual may vary)

Torque:

Not typically quoted for this class, but focused on mid-range pull.

Fuel System

Fuel Type:

Unleaded gasoline with 2-stroke engine oil mix

Oil Mix Ratio:

Typically 40:1 or 50:1 (refer to manual for precise recommendation)

🔧 Transmission

Standard

Type:

6-speed constant mesh

Clutch Type:

Wet, multi-plate

Gearbox Oil Capacity:

Approx. 0.8 - 1.0 liters (check manual for exact spec)

Gearbox Oil Type:

API GL-4 SAE 75W/90 or SAE 80 (check manual for specific recommendation)

📐 Dimensions

Exterior

Wheelbase:

Approx. 1370 mm (53.9 inches) - estimate, can vary slightly

Seat Height:

Approx. 890 mm (35 inches) - estimate

Weights

Dry Weight:

Approx. 95-105 kg (209-231 lbs) - estimate

Fuel Tank Capacity:

Approx. 8-10 Liters (2.1-2.6 Gallons) - estimate

🛡️ Safety Features

Ratings

Offroad Safety:

Designed for off-road use, safety depends heavily on rider skill and terrain conditions. Focus on predictable handling and braking.

Active Features

Braking System:

Disc front, Drum rear provides adequate stopping power for the class. Proper maintenance is key.

Passive Features

Frame Construction:

Robust steel frame designed for off-road stresses.

💡 Technology Features

Infotainment

System:

N/A (No infotainment system on this model)

Driver Assistance

Features:

N/A (No driver assistance features)

Connectivity

Features:

N/A (No connectivity features)

🔧 Maintenance

Service Intervals

Oil Change Gearbox:

Every 10-15 hours of riding or annually. Check for contamination.

Air Filter Cleaning:

Clean after every few rides, depending on dust conditions. Replace filter element when worn.

Spark Plug Inspection:

Inspect and clean/replace every 10-20 hours of riding. Check plug gap regularly.

Top End Rebuild:

Recommended every 50-100 hours of riding for optimal performance and to prevent catastrophic failure. Manual will detail piston, rings, and cylinder inspection.

Chain And Sprockets:

Lubricate chain every 200-300 miles or after washing. Inspect for wear and tension at regular intervals. Replace chain and sprockets as a set.

Fluid Specifications

Coolant:

Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio). Check manual for specific coolant type.

Brake Fluid:

DOT 3 or DOT 4 (refer to manual for exact specification).

Known Issues

Engine Seals:

Leaking crank seals or transmission seals can lead to air leaks or gearbox oil contamination. Regular inspection is crucial.

Carburetor Tuning Sensitivity:

Dell'Orto carburetors can be sensitive to altitude and temperature changes, requiring periodic fine-tuning for optimal performance.

Suspension Wear:

Fork seals and bushings can wear over time, leading to oil leaks and degraded damping. Rear shock absorber may require rebuilding or replacement depending on condition.

Maintenance Schedule Overview

Schedule:

The manual provides a comprehensive schedule covering pre-ride checks, daily/weekly tasks, and mileage/hour-based servicing. Crucial for maintaining peak performance and longevity.

📚 Vehicle History

Brand Heritage

Legacy:

Husqvarna has a long and storied history in off-road motorcycle racing, particularly in motocross and enduro, dating back to the early 20th century.

Model Evolution

125Cc Class:

The WRK 125 was part of Husqvarna's robust lineup of 125cc two-stroke off-road bikes, popular for their performance and durability.

Production

Produced during the late 1980s, a period of significant development in off-road motorcycle technology.

🏆 Awards & Recognition

Recognitions

Industry Recognition:

Husqvarna motorcycles of this era were generally well-regarded in their respective classes for performance and handling. Specific awards for the WRK 125 may not be widely documented, but the brand consistently performed well in competition.