Segment:
Lightweight Sport / Urban Motard
Target Audience:
Young riders, urban commuters, entry-level sportbike enthusiasts
Competitors:
Yamaha DT125, Suzuki RM125, Aprilia MX/RX 125, Husqvarna WRE/SM 125 (variants)
Design Philosophy:
Agile handling, spirited performance, robust construction for everyday use and light off-road
Styling:
Distinctive urban enduro/motard styling, capable of street and light trail riding
Engine:
Complete engine overhaul, component testing, tuning, lubrication system, cooling system
Fuel System:
Carburetor (model specific, e.g., Dell'Orto PHBH), fuel lines, fuel tank maintenance
Ignition System:
CDI ignition, stator, rotor, spark plug, wiring
Transmission:
6-speed gearbox, clutch (wet multi-plate), shift mechanism, gearbox oil
Chassis Frame:
Frame inspection, sub-frame, steering head bearings
Suspension Front:
Telescopic fork (e.g., Marzocchi), oil change, seal replacement, spring inspection
Suspension Rear:
Monoshock or twin shock absorber (model dependent), linkage, shock absorber adjustment, bushing replacement
Brakes Front:
Hydraulic disc brake, caliper overhaul, brake pad replacement, master cylinder, brake fluid
Brakes Rear:
Disc or drum brake (model dependent), caliper/drum maintenance, brake fluid/cable
Wheels Tires:
Spoke wheel maintenance, hub bearings, tire inspection and replacement, wheel balancing
Electrical System:
Wiring diagrams, battery, lighting (headlight, taillight, turn signals), horn, starter motor, charging system
Exhaust System:
Muffler, header pipe, sealing, maintenance
Cooling System:
Liquid-cooled (typically), radiator, hoses, coolant, thermostat
Maintenance:
Regular servicing, oil changes, filter replacements, chain adjustment, spark plug checks, battery maintenance
Troubleshooting:
Diagnostic procedures for common problems, electrical fault finding, engine performance issues
Repair:
Step-by-step instructions for component removal, disassembly, reassembly, and installation
Engine Rebuild:
Piston, cylinder, crankshaft, connecting rod, valve adjustments, sealing
Carburetor Tuning:
Adjustment of idle speed, air/fuel mixture, jetting recommendations
Suspension Overhaul:
Fork seal replacement, shock absorber rebuilds
Electrical Diagnosis:
Testing components like stator, regulator/rectifier, starter solenoid
Bodywork Repair:
Panel removal/installation, fairing repairs
Depth:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds)
Diagnostic Level:
Advanced (includes diagnostic charts, fault codes if applicable)
Technical Data:
Detailed specifications, torque values, clearances, schematics
Type:
Two-stroke, single-cylinder, liquid-cooled
Bore X Stroke:
54 mm x 54.5 mm
Compression Ratio:
Typically 7.0:1 to 7.5:1 (model specific)
Power Output:
Approximately 18-22 hp (dependent on specific model year and tuning, often restricted for licensing)
Torque Output:
Approximately 15-17 Nm
Valvetrain:
Reed valve intake, exhaust port with potentially a power valve system (e.g., ATAC)
Top Speed:
Around 110-125 km/h (depending on rider, conditions, and legal restrictions)
Carburetor:
Dell'Orto PHBH 28 (typical), Mikuni VM28 (possible variants)
Fuel Type:
Unleaded gasoline, minimum 95 RON (octane rating). Oil/fuel mixture (pre-mix or Autolube system).
Fuel Capacity:
Approximately 9-11 liters
System:
Premix or Autolube (oil injection system)
Oil Change Engine:
Every 2,000 - 3,000 km or annually
Spark Plug Check:
Every 1,000 - 2,000 km
Air Filter Cleaning:
Every 2,000 - 3,000 km (depending on conditions)
Chain Lubrication Adjustment:
Every 500 - 1,000 km
Brake Fluid Flush:
Every 2 years
Engine Oil:
2-stroke oil (API TC, JASO FD or higher) for Autolube system; 2-stroke mixture for premix
Coolant:
Ethylene glycol-based antifreeze, minimum 30% concentration (e.g., Motul Motocool Expert, Castrol Radicool)
Common Wear Items:
Clutch plates, fork seals, brake pads, wheel bearings, electrical connectors
Engine Specific:
Power valve sticking (if equipped), carburetor jetting sensitivity to altitude/fuel, potential ignition coil failure
Electrical Specific:
Corrosion in connectors, regulator/rectifier failure, stator output degradation
Air Filter Example:
Example part number: 8A0078461 (verify specific model year)
Spark Plug Example:
Example: NGK BR9EG
