Segment:
Performance Enduro / Motocross Lightweight Category
Competitors:
During 1988, the 125cc off-road market was highly competitive, with key rivals including Yamaha YZ125, Honda CR125R, Kawasaki KX125, and KTM 125 EXC. The WRK model positioned Husqvarna as a contender in the European off-road scene, often favored for its robust build and potent two-stroke power delivery.
Model Attributes:
Known for its potent two-stroke engine, long-travel suspension, and durable construction typical of Husqvarna off-road motorcycles. The WRK designation typically indicated a focus on trail riding and enduro competition.
Engine Systems:
Top-end rebuild, bottom-end overhaul, piston and ring replacement, cylinder head service, carburetor tuning and rebuilding, cooling system (if applicable, though likely air-cooled for this model), ignition system troubleshooting, exhaust system.
Transmission Systems:
Clutch operation and service, gearbox disassembly and reassembly, gear inspection, shift mechanism.
Chassis Systems:
Frame inspection and repair, suspension fork service (oil change, seal replacement), rear shock absorber inspection, steering head bearing service, swingarm and linkage maintenance.
Braking Systems:
Front and rear brake system maintenance, brake fluid bleeding, caliper inspection and service, brake lever and pedal adjustment.
Electrical Systems:
Wiring diagrams, lighting system troubleshooting, ignition coil testing, battery maintenance, starter motor (if applicable).
Fuel System:
Fuel tank service, fuel petcock operation, fuel line inspection.
Maintenance Procedures:
Regular scheduled maintenance, oil changes, air filter cleaning/replacement, spark plug inspection and replacement, chain adjustment and lubrication, tire pressure checks.
Repair Procedures:
Engine rebuilds (top and bottom end), carburetor overhaul, suspension component replacement, brake system bleeding and component replacement, electrical component testing and replacement.
Troubleshooting Procedures:
Diagnostic flowcharts for common performance issues, starting problems, electrical faults, and operational anomalies.
Electrical Diagnostics:
Troubleshooting ignition timing, charging system (if applicable), lighting circuits, and switchgear.
Frame And Bodywork:
Fairing removal and installation, fender replacement, seat service, fuel tank removal and installation, and minor frame straightening guidance.
Depth:
OEM-level detail, suitable for both experienced mechanics and dedicated enthusiasts. Includes torque specifications, clearances, and detailed step-by-step instructions for comprehensive repairs and rebuilds.
Specifications Detail:
Detailed torque values for all fasteners, critical clearances (e.g., piston-to-wall, ring gap), bearing preloads, and timing marks.
Diagrams And Illustrations:
Exploded view diagrams for all major components, step-by-step assembly illustrations, and detailed wiring diagrams.
Engine Type:
Liquid-cooled, Two-stroke, Single-cylinder
Displacement:
124.9 cc (approximately, typical for 125cc class)
Bore X Stroke:
Refer to manual for exact specifications (typically around 54mm x 54.5mm for this class).
Horsepower:
Estimated 25-30 HP at peak RPM (OEM specifications to be confirmed in manual).
Torque:
Refer to manual for exact specifications.
Carburetor:
Mikuni VM series (e.g., VM34 or similar, specific model in manual).
Fuel Type:
Unleaded gasoline with appropriate 2-stroke oil pre-mix (ratio specified in manual).
Length:
Refer to manual for exact specifications.
Width:
Refer to manual for exact specifications.
Height:
Refer to manual for exact specifications.
Wheelbase:
Refer to manual for exact specifications (typically around 55-57 inches).
Dry Weight:
Refer to manual for exact specifications (likely in the 200-220 lbs range).
Wet Weight:
Refer to manual for exact specifications (includes fluids).
Payload Capacity:
N/A (Motorcycle designed for off-road use).
Engine Oil Change:
Refer to manual for specific interval based on usage (e.g., every 10-15 hours of riding).
Air Filter Maintenance:
Clean or replace after every few rides, depending on conditions.
Spark Plug Replacement:
Refer to manual, typically every 20-30 hours of use.
Suspension Fork Oil Change:
Recommended every 20-40 hours of riding or annually.
Transmission Oil:
Refer to manual for specific type and grade (e.g., SAE 10W-40 or similar gear oil).
Fork Oil:
Refer to manual for specific viscosity and grade (e.g., Bel-Ray, Showa SS-05, or equivalent).
Coolant:
If liquid-cooled: Refer to manual for coolant type and mixture (typically ethylene glycol-based).
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid (specific grade in manual).
Common Wear Items:
Piston rings, clutch plates, suspension seals, wheel bearings, chain and sprockets.
Potential Failures:
Carburetor jetting issues due to altitude/temperature changes, ignition system component failure (CDI, coil), exhaust port blockage (carbon buildup), early suspension seal leaks.
Example Piston Kit:
Refer to manual for exact OEM part numbers (e.g., Husqvarna 14.13.xxx.xx for piston kits).
Heritage:
Husqvarna Motorcycles, founded in Sweden in 1903, has a long and storied history in off-road motorcycling, including multiple world championships in enduro and motocross. Known for robust engineering and performance.
1988 Context:
The 1988 model represents a continuation of Husqvarna's efforts in the competitive 125cc off-road segment, evolving from previous WR and CR models. This era saw significant advancements in suspension technology and engine performance in motocross and enduro bikes.
Manufacturing Origin:
Sweden (typical for Husqvarna during this period).
