Segment:
        
        
            Lightweight sport motorcycle, entry-level performance segment
        
     
    
        
            Target Audience:
        
        
            Young riders, those seeking a stylish and sporty 50cc experience, riders in regions with specific licensing requirements for larger displacements.
        
     
    
    
        
            Key Competitors 2010:
        
        
            Yamaha TZR50, Gilera SMT/RCR50, Beta RR50, Derbi Senda/GPR50, Rieju RS2/SMX50
        
     
    
    
        
            Design Philosophy:
        
        
            Sportbike styling mimicking larger Aprilia RS models, performance-oriented 50cc engine, advanced chassis for its class.
        
     
    
        
            Distinctive Attributes:
        
        
            Sharp, aggressive Italian design, race-replica aesthetics, capable handling, potent (for its class) liquid-cooled two-stroke engine.
        
     
 
    
    
    
        
            Primary Coverage:
        
        
            Workshop service and repair
        
     
    
        
            Secondary Coverage:
        
        
            Maintenance, diagnostics, troubleshooting, overhaul
        
     
    
    
        
            Estimated Pages:
        
        
            300-400 (typical for comprehensive workshop manuals)
        
     
    
    
        
            Type:
        
        
            Workshop Service Repair Manual
        
     
    
    
    
    
 
    
    
    
        
            Engine:
        
        
            Full engine assembly, disassembly, tuning, carburetor adjustment, piston/cylinder inspection, crankshaft, bearings, seals, cooling system (liquid-cooled), lubrication
        
     
    
        
            Transmission:
        
        
            Gearbox overhaul, clutch operation and adjustment, gear selection mechanism, lubrication
        
     
    
        
            Electrical System:
        
        
            Ignition system (CDI, spark plug), lighting system (headlight, taillight, indicators), starting system (kick-start), battery, wiring diagrams, fuses, sensors
        
     
    
        
            Chassis And Frame:
        
        
            Frame inspection and repair, steering head bearings, suspension (front fork, rear shock absorber), swingarm, wheel bearings
        
     
    
        
            Braking System:
        
        
            Front and rear disc brake systems, hydraulic lines, master cylinders, calipers, brake pad replacement, bleeding procedures
        
     
    
        
            Fuel System:
        
        
            Fuel tank, fuel lines, fuel filter, carburetor (Dell'Orto PHBN/PHVA common), air filter maintenance
        
     
    
        
            Bodywork And Plastics:
        
        
            Fairing removal and installation, seat, tank cover, fender components
        
     
    
    
        
            Maintenance:
        
        
            Scheduled servicing, oil changes, filter replacements, chain adjustment, spark plug service, brake fluid replacement, coolant checks
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic flowcharts for common starting issues, performance problems, electrical faults
        
     
    
        
            Repair Overhaul:
        
        
            Complete engine rebuild procedures, transmission disassembly and reassembly, suspension fork service, brake caliper overhaul
        
     
    
        
            Adjustments:
        
        
            Carburetor jetting and idle speed, clutch cable play, throttle cable free play, suspension sag
        
     
    
    
        
            Depth:
        
        
            Comprehensive; covers routine maintenance to complete engine and transmission overhauls, including detailed torque specifications, clearances, and diagnostic procedures.
        
     
 
    
    
    
        
            Type:
        
        
            Liquid-cooled, 2-stroke, single cylinder
        
     
    
    
        
            Bore X Stroke:
        
        
            39.5 mm x 40.0 mm (typical for Rotax 123 variants)
        
     
    
        
            Power Output:
        
        
            Approximately 5-7 HP (restricted for licensing, can be de-restricted)
        
     
    
        
            Torque:
        
        
            Approx. 3-4 Nm (highly dependent on state of tune)
        
     
    
    
        
            Top Speed Restricted:
        
        
            Limited by law, typically around 45-50 km/h (28-31 mph)
        
     
    
        
            Top Speed De Restricted:
        
        
            Can exceed 70-80 km/h (43-50 mph) depending on modifications and setup
        
     
    
    
        
            Carburetor:
        
        
            Dell'Orto PHBN 17.5 or PHVA 17.5 (common)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (95 RON recommended)
        
     
    
    
        
            Oil Delivery:
        
        
            Automatic oil injection system (separate oil tank)
        
     
    
    
        
            Coolant Type:
        
        
            Ethylene glycol-based coolant (50% mixture with distilled water)
        
     
    
    
        
            Spark Plug Type:
        
        
            NGK BR9ES or equivalent
        
     
 
    
    
    
        
            Type:
        
        
            6-speed manual gearbox
        
     
    
    
        
            Variator:
        
        
            N/A (Manual Transmission)
        
     
    
    
        
            Clutch Type:
        
        
            Wet multi-plate clutch, cable-actuated
        
     
    
        
            Final Drive:
        
        
            Chain drive (e.g., 11/52 or similar ratios)
        
     
    
    
        
            1St Gear:
        
        
            e.g., 28/12 (2.33)
        
     
    
        
            2Nd Gear:
        
        
            e.g., 25/16 (1.56)
        
     
    
        
            3Rd Gear:
        
        
            e.g., 24/18 (1.33)
        
     
    
        
            4Th Gear:
        
        
            e.g., 23/20 (1.15)
        
     
    
        
            5Th Gear:
        
        
            e.g., 22/22 (1.00)
        
     
    
        
            6Th Gear:
        
        
            e.g., 20/24 (0.83)
        
     
    
        
            Primary Drive Ratio:
        
        
            e.g., 19/56 (0.339)
        
     
    
        
            Final Drive Ratio:
        
        
            e.g., 11/52 (0.211)
        
     
    
    
        
            Gearbox Oil Type:
        
        
            SAE 10W/40 motorcycle gear oil (e.g., MOTUL Transoil 10W40 or equivalent API GL-4)
        
     
    
        
            Gearbox Oil Capacity:
        
        
            Approximately 0.7 - 0.8 Liters
        
     
 
    
    
    
    
    
    
        
            Wheelbase:
        
        
            Approx. 1345 mm
        
     
    
        
            Seat Height:
        
        
            Approx. 810 mm
        
     
    
    
        
            Storage:
        
        
            Under-seat storage for very small items (e.g., manual, small lock)
        
     
    
    
        
            Dry Weight:
        
        
            Approx. 120 kg
        
     
    
        
            Wet Weight:
        
        
            Approx. 130 kg (with fluids)
        
     
    
        
            Max Load Capacity:
        
        
            Approx. 120 kg (rider and cargo)
        
     
    
    
        
            Front Tire Size:
        
        
            110/70-17
        
     
    
        
            Rear Tire Size:
        
        
            130/70-17
        
     
    
        
            Wheel Type:
        
        
            Aluminum alloy, 5-spoke design
        
     
    
        
            Wheel Bolt Pattern:
        
        
            N/A (cast wheels)
        
     
 
    
    
    
        
            Crash Test Results:
        
        
            N/A (motorcycles are not subject to automotive crash testing standards)
        
     
    
    
        
            Braking:
        
        
            Dual disc brakes (front and rear) with hydraulic actuation for effective stopping power.
        
     
    
        
            Suspension:
        
        
            Upside-down telescopic front fork and adjustable monoshock rear suspension for stable handling and ride comfort.
        
     
    
    
        
            Lighting:
        
        
            Halogen headlight, LED taillight, and turn indicators for visibility.
        
     
    
        
            Chassis Design:
        
        
            Perimeter frame (aluminum or steel alloy depending on specific sub-model) offering good rigidity and handling characteristics.
        
     
 
    
    
    
        
            Display Type:
        
        
            Analog speedometer, tachometer, with basic LCD (fuel level, odometer, trip meter) or indicator lights.
        
     
    
    
        
            ABS:
        
        
            N/A (Not equipped with ABS)
        
     
    
    
        
            Bluetooth:
        
        
            N/A (No connectivity features)
        
     
    
    
        
            ECU:
        
        
            Basic CDI (Capacitor Discharge Ignition) unit with limited electronic control.
        
     
 
    
    
    
        
            Oil Change Gearbox:
        
        
            Every 6,000 km or annually, whichever comes first. More frequently for hard use.
        
     
    
        
            Spark Plug Check Replace:
        
        
            Check every 3,000 km, replace as needed or every 6,000 km. Carbon fouling is common on 2-strokes.
        
     
    
        
            Air Filter Clean Replace:
        
        
            Clean every 3,000 km, replace as needed or every 6,000 km.
        
     
    
        
            Coolant Flush:
        
        
            Every 2 years or 24,000 km.
        
     
    
        
            Chain Lubrication Adjustment:
        
        
            Lubricate and check tension every 500 km, adjust as needed.
        
     
    
    
        
            Engine Oil Injection:
        
        
            2-stroke semi-synthetic or fully synthetic oil specifically designed for high-performance air/liquid-cooled 2-stroke engines (e.g., Castrol Power 1 TTS, Motul 710 2T).
        
     
    
        
            Brake Fluid:
        
        
            DOT 4 (or DOT 3 if specified by Aprilia for specific components)
        
     
    
        
            Coolant:
        
        
            50% mixture of ethylene glycol-based antifreeze and distilled water.
        
     
    
    
        
            Carburetor Icing:
        
        
            In very cold, humid conditions, the Dell'Orto carburetors can sometimes experience icing due to fuel evaporation and airflow.
        
     
    
        
            Restrictor Tampering:
        
        
            Many models are restricted for learner-legal status; owners often remove these, which can affect long-term engine health if not tuned properly.
        
     
    
        
            Exhaust Flapper Issues:
        
        
            The exhaust power valve (often called 'flapper') can get gummed up with carbon, leading to performance issues if not decarbonized periodically.
        
     
    
        
            Electrical Connections:
        
        
            As with many smaller motorcycles, ensuring clean and tight electrical connections is crucial to prevent intermittent faults.
        
     
 
    
    
    
        
            Aprilia Motorsport Legacy:
        
        
            Aprilia has a rich racing heritage, particularly in Grand Prix motorcycle racing (250cc, 125cc classes), influencing the design and performance of their road bikes.
        
     
    
    
        
            Rs 50 Lineage:
        
        
            The RS 50 has been a staple in Aprilia's lineup for decades, evolving through several generations, each aiming to offer the most authentic sportbike experience in the 50cc class.
        
     
    
        
            Key Design Language:
        
        
            Consistently featured aggressive, aerodynamic styling inspired by their larger-displacement RSV Mille and RSV4 sportbikes.
        
     
    
    
        
            Manufacturing Location:
        
        
            Italy (Scorzè, Venice plant)
        
     
    
        
            Production Period:
        
        
            The second generation RS 50 was produced roughly from 2006 to 2010/2011, with the 2010 model being a key year in this phase.