Target Audience:
Do-it-yourself enthusiasts and experienced mechanics
Value Proposition:
Inexpensive way to maintain and repair the vehicle, saving on professional service costs
Instructional Method:
Step-by-step instructions based on complete disassembly
Visual Aids:
Hundreds of photos and illustrations
Knowledge Building:
Enables users to learn about their vehicle and prevent future problems
Engine:
Complete engine overhaul, internal components, lubrication, cooling, starting systems
Fuel System:
Carburetor adjustment and overhaul, fuel pump, fuel lines, filters
Cooling System:
Radiator, coolant, hoses, thermostat, fan operation
Electrical System:
Ignition system, lighting, charging system, starter motor, battery, wiring diagrams
Chassis:
Frame, suspension (front forks, rear shock), steering, wheels, brakes, drivetrain (chain, sprockets)
Emission Control Information:
Relevant emission control systems and their servicing (if applicable to model year)
General Information:
Vehicle identification, safety precautions, general maintenance guidelines, specifications overview.
Services Information:
Torque specifications, fastener tightening sequences, special tools required, general repair advice.
Maintenance:
Periodic maintenance schedules, oil changes, filter replacements, chain adjustment, brake checks
Repair:
Step-by-step repair instructions for all major vehicle systems
Rebuild:
Detailed procedures for engine, transmission, and suspension component rebuilding
Troubleshooting:
Diagnostic procedures for common problems and fault finding
Depth:
Comprehensive, covering from basic maintenance to advanced repair and rebuilding procedures
Engine Type:
Two-stroke, single-cylinder (typical for SM 125)
Displacement:
125cc (approximate, specific variant may exist)
Horsepower:
Typically around 30-35 HP (varies by specific model and tuning)
Torque:
Not explicitly stated, but expected to be performance-oriented for supermoto use
Carburetion:
Likely a Dell'Orto or similar performance carburetor (e.g., PHBH, VHSB)
Fuel Type:
Unleaded gasoline with appropriate two-stroke oil pre-mix ratio
Cooling Method:
Liquid-cooled
Oil Type:
High-quality synthetic two-stroke engine oil
Safety Certification:
Not applicable for motorcycle safety ratings in the same manner as cars; focused on operational safety
Braking System:
Hydraulic disc brakes front and rear (e.g., Brembo calipers common)
Suspension System:
Upside-down front forks, adjustable rear monoshock (performance oriented)
Frame Construction:
Steel or aluminum perimeter frame
Instrument Cluster:
Analog tachometer, speedometer, odometer, trip meter, indicator lights (neutral, turn signals, etc.)
ABS:
Not typically equipped on this model; ABS was not common on smaller displacement motorcycles of this era.
Bluetooth:
Not applicable
Oil Change Interval:
Refer to manual; typically every 20-30 engine hours or annually for sporadic use.
Spark Plug Replacement:
Refer to manual; typically every 5,000-10,000 km or as per manual recommendations.
Air Filter Cleaning:
Frequent cleaning/replacement recommended based on riding conditions (dusty environments).
Engine Oil Type:
Specific 2-stroke engine oil for premix (e.g., Motul 710, Castrol TTS) and gearbox oil (e.g., SAE 10W-40 API GL-4)
Coolant Type:
Ethylene glycol-based antifreeze coolant with corrosion inhibitors
Carburetor Tuning:
Can be sensitive to altitude and temperature changes; requires proper jetting for optimal performance.
Power Valve Operation:
Can accumulate carbon deposits, affecting engine performance; requires periodic cleaning.
Suspension Seals:
Fork and shock seals can wear over time, leading to leaks; requires periodic inspection and replacement.
Clutch Wear:
Friction plates can wear out with aggressive use; requires checking and replacement as needed.
Manufacturer:
Husqvarna Motorcycles is one of the oldest motorcycle manufacturers, originating in Sweden.
Sm Series:
The SM series represents Husqvarna's entry into the supermoto category, blending off-road chassis with road-legal components and street tires.
Production Period:
The SM 125 was part of Husqvarna's smaller displacement offerings, popular in European markets, particularly for its agile handling and sporty performance.
