Segment:
Lightweight sport motorcycle, popular for urban commuting and entry-level performance riding.
Target Audience:
New riders, commuters, enthusiasts seeking an agile and economical two-wheeler.
Key Competitors:
Aprilia RS 125, Yamaha DT 125, Honda CRM 125, Suzuki RM 125 (depending on year and market).
Design Philosophy:
Emphasizes a sporty, agile streetfighter aesthetic with performance-oriented components for its class.
Handling Characteristics:
Lightweight chassis and responsive suspension contribute to nimble handling in urban environments.
Engine Systems:
Engine assembly, disassembly, tuning, lubrication, cooling system, valve timing, piston/ring inspection, cylinder head servicing, crankshaft and connecting rod service, gearbox integration.
Fuel System:
Carburetor identification, adjustment, cleaning, and overhaul; fuel tank, fuel pump (if applicable), fuel lines, and filter maintenance.
Ignition System:
Spark plug specifications, ignition timing, CDI unit, stator, rotor, and wiring diagnostics.
Transmission System:
Clutch operation, adjustment, and replacement; gearbox disassembly, inspection, lubrication, and reassembly; shift mechanism.
Chassis And Suspension:
Front fork (telescopic) servicing, seals, oil changes, damping adjustments; rear shock absorber maintenance and adjustment; swingarm inspection and lubrication; steering head bearing service.
Braking System:
Front and rear brake caliper service, pad replacement, fluid bleeding and replacement (DOT standard), master cylinder overhaul, brake line inspection.
Electrical System:
Wiring diagrams, battery maintenance, lighting circuits (headlight, taillight, indicators), horn, starter motor, charging system (alternator/stator), fuses, relays, instrument cluster diagnostics.
Bodywork And Frame:
Frame inspection, fairing and body panel removal/installation, seat assembly, fuel tank mounting, exhaust system removal/installation, graphics and trim.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment and lubrication, spark plug checks, brake fluid flushes, tire pressure checks, air filter cleaning/replacement.
Diagnostic Procedures:
Troubleshooting guides for common starting issues, running problems, electrical faults, and braking system irregularities.
Major Repairs:
Engine rebuilds, gearbox overhauls, suspension fork rebuilds, brake caliper overhauls, electrical component replacement.
Technical Adjustments:
Carburetor jetting and idle speed adjustment, ignition timing verification, clutch cable adjustment, suspension preload and damping settings.
Component Replacement:
Step-by-step instructions for replacing parts such as brake pads, clutches, cables, bulbs, batteries, and wear items.
Diagnostic Capability:
Advanced diagnostics for engine performance issues, electrical system faults, and mechanical wear using specified measurement tools.
Rebuild Capability:
Comprehensive engine and gearbox rebuild procedures with torque specifications, clearances, and part tolerances.
Troubleshooting Methodology:
Systematic troubleshooting trees and symptom-based diagnostic flows.
File Type:
PDF (Portable Document Format)
Searchability:
Full text search enabled for keywords and component names.
Printability:
Printable on demand, allowing for focused printing of specific sections.
Resolution:
High-resolution scans and digital typesetting ensuring clarity of diagrams and text.
Physical Format Description:
Not applicable for digital PDF, but implies professional layout for potential printing.
Physical Format Description:
Not applicable for digital PDF, but original manuals often used durable, matte finish paper.
Type:
Liquid-cooled, 2-stroke, single-cylinder
Displacement:
124.8 cc (approx.)
Bore X Stroke:
56 mm x 50.6 mm (typical for M2 engine)
Compression Ratio:
7.4:1 (approx.)
Power Output:
11 kW (15 hp) @ 7,500 rpm (typical for European A1 license regulations), some versions may be de-restricted.
Torque Output:
13.5 Nm @ 7,000 rpm (typical)
Reed Valve Induction:
Yes, typically rotary disc valve or reed block induction.
Carburetor Type:
Dell'Orto PHBH 28 AS or similar (28mm slide carburetor)
Fuel Type:
Unleaded gasoline, minimum 95 RON (Octane Rating)
Oil Mixture:
Pre-mix or automatic oil injection system (check specific model year).
System:
Petter oil injection system or manual pre-mix
Engine Oil Type:
2-stroke engine oil meeting API TC, JASO FD, or ISO-L-EGD standards.
Crash Test Data:
Not applicable for this type of motorcycle; safety is based on design, handling, and braking capabilities.
Braking System:
Hydraulic disc brakes front and rear for effective stopping power.
Suspension Design:
Telescopic front forks and monoshock rear suspension for stability and control.
Lighting:
Full lighting system including headlight, taillight, brake light, and turn signals.
Frame Construction:
Steel perimeter frame offering rigidity and durability.
Engine Oil Change:
Every 2,000-3,000 km or annually, depending on usage (refer to manual for precise intervals).
Air Filter Cleaning:
Every 1,000-2,000 km or as needed based on operating conditions (dusty environments require more frequent checks).
Spark Plug Check:
Every 2,000-4,000 km, replace as needed.
Chain Lubrication:
Every 500 km and after riding in rain or washing.
Brake Fluid Replacement:
Every 2 years or as recommended by manufacturer.
Engine Oil:
2-stroke, API TC, JASO FD/FD approved, 100% synthetic or semi-synthetic recommended.
Transmission Oil:
Not applicable for 2-stroke; gearbox lubrication is via separate oil in some designs, check manual. If applicable, SAE 80W-90 gear oil.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Coolant:
Ethylene glycol based coolant mixture with distilled water (50/50 ratio), or specific motorcycle coolant.
Carburetor Tuning:
Can be sensitive to altitude and temperature changes, requiring periodic adjustment for optimal performance and fuel economy.
Exhaust Port Fouling:
Common in 2-stroke engines, requires periodic cleaning of exhaust ports and power valve (if equipped).
Clutch Wear:
Clutch plates can wear over time, especially with aggressive riding, leading to slipping.
Electrical Connections:
Corrosion or loose connections in wiring harnesses can cause intermittent electrical issues.
