Segment:
Entry-level sportbike, popular among younger riders and for track day enthusiasts.
Target Audience:
Motorcycle enthusiasts seeking a performance-oriented, lightweight, and stylish 50cc sportbike.
Key Competitors:
Derbi GPR50, Yamaha TZR50, Aprilia RS Tuono 50 (naked variant).
Design Philosophy:
Emulates the larger Aprilia sportbike designs, offering a premium feel and sporty ergonomics.
Performance Focus:
High-revving 2-stroke engine, capable chassis, and performance-oriented suspension.
Handling:
Agile and precise handling due to lightweight construction and quality suspension components.
Engine Mechanical:
Complete engine overhaul, disassembly, assembly, inspection, and component replacement for the Rotax 50cc 2-stroke engine.
Engine Fuel System:
Carburetor tuning, cleaning, and overhaul (likely Dell'Orto PHVA/PHVB), fuel tank, fuel pump (if applicable), fuel lines.
Ignition System:
CDI unit, spark plug specifications, coil, wiring diagrams.
Exhaust System:
Exhaust manifold, silencer, and performance considerations.
Cooling System:
Liquid cooling system: radiator, water pump, thermostat, coolant specifications, bleeding procedures.
Transmission:
6-speed gearbox operation, disassembly, assembly, clutch (wet multi-plate), gear shift mechanism, lubrication.
Chassis Frame:
Frame inspection, welding repairs (if applicable), alignment.
Suspension Front:
Upside-down (USD) front forks: disassembly, seal replacement, oil type and level, damping adjustments.
Suspension Rear:
Monoshock rear suspension: linkage lubrication, shock absorber adjustment, spring preload.
Brakes Front:
Hydraulic disc brake system: caliper, master cylinder, brake lines, pad replacement, rotor specifications, bleeding.
Brakes Rear:
Hydraulic disc brake system: caliper, master cylinder, brake lines, pad replacement, rotor specifications, bleeding.
Wheels Tires:
Wheel bearing replacement, tire pressure, tire sizes, wheel balancing.
Electrical System:
Wiring diagrams, battery, starter motor, lighting (headlight, taillight, indicators), horn, fuses, relays.
Bodywork:
Fairings, seat, fuel tank cover, tail section, mounting points, fasteners.
Instruments Controls:
Dashboard, speedometer, tachometer, switches, levers.
Routine Maintenance:
Oil changes, chain lubrication and adjustment, air filter cleaning/replacement, spark plug replacement, brake fluid checks.
Troubleshooting:
Diagnostic procedures for common problems, identifying and resolving issues with engine performance, electrical faults, and braking.
Component Overhaul:
Detailed step-by-step guides for disassembling, cleaning, inspecting, repairing, and reassembling major components.
Suspension Service:
Front fork seal replacement, rear shock absorber adjustments, linkage maintenance.
Brake System Maintenance:
Brake pad and rotor replacement, caliper service, brake fluid bleeding.
Electrical Diagnostics:
Interpreting wiring diagrams, testing electrical components, troubleshooting lighting and ignition issues.
Torque Specifications:
Precise torque values for all critical fasteners and engine components.
Special Tools:
Identification and usage of specialized tools required for specific repair procedures.
Depth Level:
Comprehensive: Covers from basic owner maintenance to full engine and chassis rebuilds.
Diagnostic Capability:
Advanced: Includes troubleshooting charts, common fault identification, and systematic diagnostic approaches.
Scope:
Full workshop coverage suitable for professional mechanics and experienced DIY enthusiasts.
Engine Type:
Liquid-cooled, 2-stroke, single-cylinder
Engine Manufacturer:
Rotax
Bore X Stroke:
39.5 mm x 40.8 mm (Typical for Rotax 50cc)
Compression Ratio:
Approximately 8.5:1 to 9.5:1 (Varies by specific model year/tune)
Power Output:
2.6 kW (3.5 hp) at approximately 6,500 rpm (EU moped regulations, actual output may be higher)
Torque:
Approximately 3.7 Nm at 6,000 rpm (Varies)
Top Speed:
Governed by legislation for 50cc mopeds (typically around 45-50 km/h), but capable of higher speeds with unrestricted tuning.
Carburetor:
Dell'Orto PHVA 12/14 DD or similar (depending on year and market)
Fuel Type:
Unleaded Gasoline (95 RON recommended)
Oil Mixture:
Pre-mix or separate oil injection system (check manual for specifics).
Oil Change Engine:
Refer to manual; typically every 2,000-3,000 km or annually, whichever comes first (for 2-stroke, this is transmission oil).
Spark Plug Inspection:
Refer to manual; typically every 2,000-4,000 km.
Air Filter Cleaning:
Refer to manual; typically every 2,000-3,000 km, or more frequently in dusty conditions.
Chain Lubrication:
Refer to manual; recommended every 500-1000 km, or after riding in wet conditions.
Brake Fluid Flush:
Refer to manual; typically every 2 years or as per manual recommendation.
Engine Oil Type:
For 2-stroke oil injection: SAE 7.5W-40 or 10W-40 JASO FD/API TC rated 2-stroke oil.
Transmission Oil Type:
SAE 75W-90 or 80W-90 API GL-3 or GL-4 gear oil.
Coolant Type:
Ethylene glycol-based antifreeze with corrosion inhibitors (typically a 50/50 mix with distilled water).
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Carburetor Fouling:
Common in 2-strokes due to fuel/oil mix and short riding cycles, requires regular cleaning.
Cooling System Leaks:
Potential for hose degradation or minor leaks over time, particularly at connections.
Exhaust Port Fouling:
Carbon buildup in the exhaust port and power valve due to the 2-stroke nature.
Electrical Connections:
Corrosion or loose connections in wiring harness over years of use.
