Product Positioning:
Essential diagnostic and repair resource for owners and mechanics of the 1989 Husqvarna WRK 240 and WRK 260 motorcycles, targeting the vintage off-road/enduro segment.
Manual Value Proposition:
Provides OEM-level detail often unavailable in aftermarket manuals, ensuring accuracy for restoration and performance tuning. Crucial for maintaining these older, specialized machines.
Manual Features:
Comprehensive system coverage, detailed torque specifications, wiring diagrams, troubleshooting flowcharts, and step-by-step repair procedures.
Engine Systems:
Engine assembly, disassembly, tuning, carburetor adjustment, cooling system (air-cooled), lubrication, ignition system, starting system.
Drivetrain Systems:
Clutch operation and adjustment, transmission overhaul, gear selection mechanism, final drive (chain drive).
Chassis Systems:
Frame inspection and repair, suspension (front forks, rear shock absorber/linkage), steering system, wheel and tire maintenance, braking system (drum brakes likely front and rear for this era).
Electrical Systems:
Wiring diagrams, lighting system, ignition coil and spark plug troubleshooting, battery maintenance, CDI unit.
Bodywork And Trim:
Body panel removal and installation, seat maintenance, fuel tank removal and installation, fenders.
Maintenance Procedures:
Regular servicing, lubrication points, air filter cleaning/replacement, spark plug replacement, chain adjustment, brake adjustment, carburetor cleaning and synchronization.
Repair Procedures:
Engine rebuilds (piston, rings, cylinder, crankshaft), gearbox repairs, suspension component replacement, carburetor overhaul, brake system service.
Troubleshooting Guides:
Diagnostic procedures for common starting problems, running issues, electrical faults, and performance degradation.
Depth Of Coverage:
Comprehensive OEM level. Covers routine maintenance, diagnostics, complete disassembly and reassembly of major components, and detailed specifications for accurate repairs.
Engine Type:
Two-stroke, single-cylinder, liquid or air-cooled (confirm specific model variant, WRK typically air-cooled).
Bore X Stroke 240:
Specific data not provided in product info, but typically around 67mm x 65mm for a 240cc class.
Bore X Stroke 260:
Specific data not provided in product info, but typically around 69mm x 70mm for a 260cc class.
Displacement Cc 240:
Approximately 239cc
Displacement Cc 260:
Approximately 258cc
Engine Cooling:
Air-cooled (typical for WRK models of this era)
Horsepower Estimate:
Estimated 30-35 HP (varies by specific tuning and model year).
Torque Estimate:
Estimated 20-25 lb-ft (varies by specific tuning and model year).
Carburetor Type:
Single Mikuni VM carburetor (e.g., VM34 or VM36, to be confirmed in manual).
Fuel Type:
Unleaded gasoline mixed with two-stroke oil (premix).
Fuel Oil Ratio:
Typically 40:1 or 50:1, to be specified in manual.
Overall Length:
Not specified in product info, but typical for enduro bikes of the era.
Wheelbase:
Not specified in product info, but typical for enduro bikes of the era.
Dry Weight Estimate:
Approximately 240-260 lbs (109-118 kg).
Fuel Tank Capacity Estimate:
Approximately 2.5-3.0 gallons (9.5-11.4 liters).
Safety Ratings:
Not applicable for motorcycles in the same way as cars; safety relies on rider skill and mechanical integrity.
Braking System Front:
Drum brake (likely hydraulic actuation).
Braking System Rear:
Drum brake (likely hydraulic actuation).
Lighting System:
Headlight, taillight/stoplight, turn signals (may be optional or basic).
Oil Change Interval:
Not applicable (two-stroke engine, requires premix).
Spark Plug Check Interval:
Recommended every 50-100 hours or as per manual.
Air Filter Maintenance:
Frequent cleaning/replacement recommended, especially in dusty conditions. Check every ride, clean every few rides.
Chain Lubrication And Adjustment:
Lubricate chain every 200-300 miles or more frequently in wet/dirty conditions. Adjust slack as needed, typically around 20-30mm.
Transmission Oil Type:
API GL-4 or GL-5 gear oil, SAE 80 or 85W. Specific type and capacity in manual.
Fork Oil Type:
Specific viscosity (e.g., SAE 7.5W or 10W) and capacity for front forks will be detailed in the manual.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid, depending on system specification.
Common Issues:
Wear on clutch plates, carburetor jetting sensitivity to altitude/temperature, fork seal leaks, kickstart mechanism wear, ignition coil failure.
Typical Maintenance Focus:
Maintaining correct fuel/oil mixture, ensuring proper carburetor function, checking and adjusting chain tension, and regular cleaning of air filter are critical.
Husqvarna Heritage:
Husqvarna is a Swedish brand with a long and distinguished history in off-road motorcycle racing, known for its robust and capable machines.
Wrk Series:
The WRK series represented Husqvarna's entry into more competitive enduro and off-road racing in the late 1980s, building on their established reputation.
Production Era:
Late 1980s, specifically 1989 for this manual's coverage.
