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Introduction
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Market Position
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Segment:
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Lightweight off-road/supermoto motorcycles, appealing to younger riders, enthusiasts, and those seeking agile performance.
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Target Audience:
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DIY mechanics, motorcycle repair shops, and owners who prefer to perform their own maintenance and repairs.
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Competitive Analysis
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Competitors:
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KTM EXC 125, Yamaha YZ125, Honda CR125R (older models), GasGas EC 125.
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Key Features
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Features:
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Emphasis on comprehensive OEM information, detailed procedures, torque specifications, and troubleshooting guides for the 2011 models.
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Manual Value
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Value Proposition:
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Provides essential technical data and repair guidance to maintain the Husqvarna WRE 125 and SMS 125, ensuring optimal performance and longevity.
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Manual Coverage
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Systems Covered
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Engine Overhaul:
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Complete engine disassembly, inspection, repair, and reassembly procedures for the 125cc two-stroke engine.
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Cooling System:
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Radiator, coolant hoses, water pump, thermostat, and related components maintenance and repair.
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Fuel System:
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Carburetor (likely Mikuni VM28 or similar), fuel tank, fuel lines, fuel filter servicing and adjustment.
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Ignition System:
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CDI unit, ignition coil, spark plug, stator, and wiring diagnosis and repair.
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Exhaust System:
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Expansion chamber, silencer maintenance and inspection.
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Transmission And Clutch:
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Gearbox inspection, maintenance, and repair, clutch operation, adjustments, and component replacement.
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Suspension Front:
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Upside-down (USD) front fork service, including oil changes, seal replacement, and damping adjustments.
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Suspension Rear:
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Monoshock rear suspension system service, including linkage maintenance, shock absorber inspection, and adjustment.
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Brakes Front:
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Hydraulic disc brake system service, including caliper overhaul, master cylinder maintenance, pad replacement, and bleeding procedures.
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Brakes Rear:
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Hydraulic disc brake system service, including caliper overhaul, master cylinder maintenance, pad replacement, and bleeding procedures.
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Wheel And Tire:
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Wheel bearing service, spoke tensioning, tire replacement, and balancing procedures.
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Electrical System:
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Wiring diagrams, lighting system, battery, starter motor (if applicable), and general electrical troubleshooting.
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Frame And Bodywork:
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Frame inspection, fairing removal and installation, seat, fuel tank mounting, and handlebar components.
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Procedures Included
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Routine Maintenance:
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Oil changes, filter replacements, chain lubrication and adjustment, brake fluid checks, spark plug checks and replacement.
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Troubleshooting Guides:
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Diagnostic charts and procedures for common problems, performance issues, and starting difficulties.
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Rebuilding Procedures:
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Detailed instructions for rebuilding major components like the engine, carburetor, brake calipers, and suspension forks.
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Specifications And Tolerances:
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Precise torque values, clearances, measurements, and wear limits for all serviceable parts.
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Special Tool Requirements:
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Identification of necessary special tools for specific repair procedures.
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Technical Depth
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Depth:
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Comprehensive, covering everything from basic checks and adjustments to complete engine and component overhauls.
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Diagnostic Capabilities:
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Detailed troubleshooting trees and symptom-based diagnostic guidance.
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Diagnostic Tools:
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Information on electrical testing procedures and potential use of diagnostic equipment if applicable to the era.
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Engine Specifications
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Primary Engine
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Type:
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125cc Liquid-Cooled Two-Stroke Single Cylinder
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Bore X Stroke:
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Typically around 54mm x 54.5mm (exact for 2011 model to be confirmed in manual).
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Displacement:
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124.8 cc
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Power Output:
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Estimated 30-35 HP (subject to specific model variant and tuning; exact figures in manual).
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Torque:
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Not typically a primary metric for this class of engine, but torque figures will be present in the manual.
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Fuel System
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Carburetor:
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Likely Mikuni VM28 or similar single carburetor. Manual will detail jetting, float height, and adjustment.
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Fuel Type:
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Unleaded gasoline with appropriate two-stroke oil pre-mix (manual will specify ratio).
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Lubrication
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Oil System:
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Premix lubrication or separate oil injection system (depending on specific sub-model, manual will clarify).
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Ignition
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Ignition Type:
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Digital CDI (Capacitor Discharge Ignition)
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Cooling
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Cooling Method:
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Liquid-Cooled
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Maintenance
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Service Intervals
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Oil Change Engine:
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Specific intervals for engine oil (if applicable, for gearbox) and gearbox oil changes will be detailed in the manual, typically every 10-20 hours of use or annually.
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Spark Plug Check:
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Regular checks recommended, typically every 10-20 hours of use. Manual will specify type and gap.
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Air Filter Cleaning:
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Frequent cleaning recommended, especially in dusty conditions (every 5-10 hours).
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Chain Maintenance:
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Regular cleaning, lubrication, and tension adjustment (every 5-10 hours).
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Suspension Service:
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Fork oil changes typically every 20-40 hours; rear shock linkage lubrication annually or as needed.
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Fluid Specifications
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Coolant:
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Manual will specify recommended coolant type (e.g., ethylene glycol-based antifreeze mixture) and capacity.
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Brake Fluid:
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DOT 4 hydraulic brake fluid recommended. Manual will specify replacement intervals and bleeding procedures.
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Known Issues
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Common Wear Items:
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Clutch plates, piston rings, spark plugs, air filter, and wheel bearings are common wear items requiring regular inspection and replacement.
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Carburetor Tuning:
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Carburetor may require re-jetting or adjustment based on altitude, temperature, and modifications.
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Exhaust Carbon Buildup:
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Two-stroke expansion chambers can accumulate carbon, requiring periodic cleaning or decoking.
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