Segment:
Off-road/Enduro and Motocross motorcycles
Target Audience:
Owners, mechanics, and enthusiasts of 1991 Husqvarna WR and CR models.
Competitors 1991:
KTM, Yamaha YZ series, Honda CR series, Suzuki RM series, Kawasaki KX series.
Manual Focus:
Comprehensive repair and maintenance guidance for specific 1991 Husqvarna models.
Oem Status:
Described as 'Most Complete OEM', indicating high authenticity and detail.
Primary Models Covered:
Husqvarna WR-CR 125, WR 240, WR 250, WR 260, CR 250
Estimated Page Count:
Extensive (specific page count not provided, but typical for OEM service manuals)
Type:
Workshop Service Repair Manual
Engine:
Complete engine disassembly, assembly, inspection, tuning, and troubleshooting for all listed displacements (125cc, 240cc, 250cc, 260cc).
Transmission:
Gearbox inspection, repair, clutch service, and adjustment procedures.
Chassis:
Frame inspection, front suspension (forks) service and overhaul, rear suspension (shock absorber, linkage) service.
Brakes:
Front and rear brake system inspection, maintenance, caliper service, hydraulic system bleeding, and pad replacement.
Electrical:
Ignition system, lighting, wiring diagrams, battery maintenance, and troubleshooting for electrical components.
Fuel System:
Carburetor identification, cleaning, adjustment, jetting, fuel tank, and fuel line maintenance.
Cooling System:
Radiator, hoses, and coolant maintenance (where applicable for specific models).
Exhaust System:
Muffler and pipe maintenance.
Wheels And Tires:
Wheel bearing maintenance, spoke tightening, and tire pressure recommendations.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, chain lubrication and adjustment, air filter cleaning.
Troubleshooting Diagnostics:
Detailed guides for diagnosing common starting, running, and performance issues.
Component Overhaul:
Complete disassembly and reassembly instructions for major components like the engine, carburetor, and suspension.
Adjustments:
Carburetor tuning, clutch adjustment, brake lever adjustment, suspension setup.
Torque Specifications:
Essential torque values for critical fasteners throughout the motorcycle.
Wiring Diagrams:
Comprehensive electrical schematics for all systems.
Depth:
OEM-level technical detail covering from basic maintenance to complete engine and chassis rebuilds.
Engine Type:
2-stroke, single cylinder, liquid-cooled (typical for these models)
Bore Stroke 125:
Approx. 54mm x 54.5mm (typical for 125cc)
Bore Stroke 240:
Approx. 67mm x 67mm (typical for 240cc)
Bore Stroke 250:
Approx. 68mm x 68mm (typical for 250cc)
Bore Stroke 260:
Approx. 70mm x 68mm (typical for 260cc)
Reed Valve System:
Standard (typical for performance 2-strokes)
Horsepower 125:
Approx. 30-35 HP (estimated, specific to tuning)
Horsepower 250:
Approx. 38-45 HP (estimated, specific to tuning)
Carburetor Type 125:
Mikuni VM34 (typical)
Carburetor Type 250:
Mikuni TM36 or similar (typical)
Fuel Type:
Unleaded gasoline mixed with 2-stroke oil (pre-mix ratio specified in manual)
Safety Certification:
Not applicable to off-road motorcycles in the same way as street vehicles. Focus is on mechanical integrity and rider control.
Handling:
Designed for agile off-road handling, requiring rider skill.
Protective Gear Recommendation:
Manual will implicitly or explicitly require appropriate protective gear (helmet, boots, etc.) for operation.
Oil Change:
Variable, dependent on usage (e.g., every 10-15 hours of riding for gearbox oil).
Spark Plug Check:
Regular checks recommended (e.g., every 20-30 hours or as per manual guidance).
Air Filter Cleaning:
Frequent cleaning is crucial for 2-stroke performance, especially in dusty conditions.
Top End Rebuild:
Recommended every 40-60 hours of hard use for optimal performance (piston, rings, cylinder).
Gearbox Oil:
Specific 2-stroke transmission oil (e.g., SAE 75W/80 or 10W-40 motorcycle specific oil - consult manual for exact spec).
Coolant:
Ethylene glycol-based antifreeze mixed with distilled water (if liquid-cooled).
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific type).
Common Wear Items:
Clutch plates, piston rings, kick-start mechanism, suspension seals, chain and sprockets.
Carburetor Tuning:
Can be sensitive to altitude and temperature changes, requiring periodic adjustment.
Suspension Seals:
Fork and shock seals can degrade over time, leading to leaks.
