Segment:
Entry-level sportbike, geared towards younger riders and A1 license holders
Competitors:
Yamaha TZR50, Honda NSR50, Derbi GPR50
Design:
Aggressive styling mimicking larger Aprilia sportbikes, aerodynamic fairings
Performance Focus:
Emphasis on sporty handling and acceleration within the 50cc class
Build Quality:
Renowned Aprilia build quality and attention to detail for its class
Engine:
Disassembly, inspection, assembly, tuning, troubleshooting
Fuel System:
Carburetor adjustment (Dell'Orto PHVA 17.5 ED), fuel lines, fuel tank, fuel pump (if applicable)
Ignition System:
CDI unit, spark plug specifications, stator and rotor testing
Cooling System:
Radiator, water pump, thermostat, coolant type and capacity
Exhaust System:
Expansion chamber, muffler, gasket replacement
Transmission:
Clutch operation, gearbox disassembly, inspection, assembly, lubrication
Frame And Suspension:
Front fork (upside-down type), rear shock absorber, swingarm, linkage lubrication and adjustment
Braking System:
Front and rear brake caliper servicing, hydraulic system bleeding, pad replacement, disc inspection
Electrical System:
Wiring diagrams, lighting, horn, battery maintenance, starter motor, charging system
Bodywork And Trim:
Fairing removal and installation, seat, controls, instrumentation
Troubleshooting:
Diagnostic charts for common starting, running, and performance issues
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks
Engine Rebuild:
Top-end (piston, cylinder, head) and bottom-end (crankshaft, bearings) procedures
Carburetor Tuning:
Jetting adjustments, float height, idle speed setting
Suspension Setup:
Preload adjustment, damping settings (if applicable)
Brake Bleeding:
Step-by-step guide for hydraulic brake system bleeding
Electrical Diagnostics:
Component testing, continuity checks, voltage measurements
Special Tool Identification:
Lists and usage of specific Aprilia tools required for repairs
Depth Level:
Expert; covers complete overhaul and advanced diagnostics
Engine Type:
Two-stroke, single-cylinder, liquid-cooled
Displacement:
49.7 cc (3.03 cu in)
Bore X Stroke:
39.5 mm x 40.6 mm
Compression Ratio:
Approx. 7.4:1 (often variates with market regulations)
Power Output:
Typically around 6.5-7.0 HP at 9,000 RPM (restricted for A1 license)
Torque:
Approx. 5.0 Nm (3.7 lb-ft) at 8,500 RPM
Top Speed:
Legally restricted in many markets, often around 45 mph (72 km/h)
Carburetor:
Dell'Orto PHVA 17.5 ED
Fuel Type:
Unleaded gasoline, minimum 95 RON
Fuel Mixture:
Premix (oil mixed with gasoline) or separate oil injection system
Oil Type:
Two-stroke engine oil, API TC or JASO FD certified
Safety Standards:
Compliant with European L1e-B moped regulations
Brakes:
Front: 280mm disc with 2-piston caliper; Rear: 220mm disc with 2-piston caliper
Tires:
Front: 100/80-17; Rear: 130/70-17
Lighting:
Halogen headlamp, LED taillight
Chassis:
Aluminum alloy twin-spar frame for rigidity and light weight
Oil Change Recommendation:
Every 3,000-5,000 km (1,800-3,000 miles) or annually
Spark Plug Replacement:
Every 6,000-8,000 km (3,700-5,000 miles)
Air Filter Cleaning:
Every 3,000 km (1,800 miles) or as needed based on conditions
Chain Lubrication And Adjustment:
Every 500 km (300 miles) or after riding in wet conditions
Coolant Type:
Ethylene glycol-based antifreeze, 50% solution with distilled water
Transmission Oil Type:
API GL-4, SAE 75W/90 or 80W/90 gear oil
Common Problems:
Carburetor jetting sensitivity to altitude and modifications, potential for exhaust gasket leaks, stator failure, clutch wear
Tune Up Frequency:
Regular tuning of the Dell'Orto carburetor is crucial for optimal performance and longevity
Brand Legacy:
Aprilia is an Italian manufacturer with a strong racing heritage, particularly in smaller displacement classes
Generation Summary:
The 2001 RS50 is part of the second generation, featuring updated styling and chassis improvements over the first generation (1992-1999)
Manufacturing Location:
Italy
Production Years For Model:
1992-2005 (with significant updates in 2000 for the second generation)
