Target Audience:
Aprilia SR50 Ditech owners and independent repair shops seeking detailed service information.
Value Proposition:
Provides comprehensive, step-by-step repair procedures and technical data, enabling efficient and accurate servicing.
Download Method:
Instant Download upon secure payment completion.
Content Highlight:
Includes special notes, important points, service data, precautions, and wear limits.
Presentation Style:
Simple and precise explanations, supported by diagrams and illustrations.
Engine:
Complete disassembly, assembly, repair, diagnostics, and tuning of the Ditech direct injection engine.
Fuel System:
Direct injection system, fuel pump, injectors, fuel lines, fuel filter, fuel tank.
Ignition System:
Ignition coil, spark plug, CDI unit, wiring.
Cooling System:
Liquid cooling system, radiator, water pump, hoses, thermostat.
Transmission:
Automatic CVT (Continuously Variable Transmission) removal, inspection, adjustment, and maintenance.
Brakes:
Front and rear brake systems (disc brakes), hydraulic lines, master cylinders, calipers, brake pads, brake fluid.
Suspension:
Front telescopic forks and rear shock absorber system, including fork seals and oil changes.
Electrical System:
Wiring diagrams, battery, starter motor, lighting system, charging system (stator, regulator/rectifier), fuses, relays, instrument cluster.
Frame And Bodywork:
Chassis components, body panels, seat, handlebars, footpegs, fairings, removal and installation procedures.
Maintenance:
Scheduled maintenance, fluid checks and changes, filter replacements, lubrication, brake adjustments, tire pressure.
Troubleshooting:
Diagnostic procedures for common and complex issues across all major systems.
Repair:
Detailed step-by-step instructions for component removal, disassembly, repair, reassembly, and installation.
Adjustments:
Carburetor adjustments (if applicable to specific sub-models within the range), ignition timing, brake lever free play, clutch adjustment (if applicable).
Specifications:
Torque values, clearances, fluid capacities, wear limits, technical data for all components and systems.
Special Tools:
Identification and usage instructions for specialized tools required for specific repair or adjustment procedures.
Depth:
Comprehensive 'bumper to bumper' coverage, suitable for both professional mechanics and experienced DIY enthusiasts.
Detail Level:
Includes detailed pictorial diagrams, exploded views, photographs, and schematics for clarity.
Diagnostic Approach:
Focuses on understanding construction and function before troubleshooting and repair.
Engine Type:
2-stroke, single-cylinder, liquid-cooled with Ditech direct injection
Bore X Stroke:
Commonly around 40mm x 39.3mm (specific to engine variant)
Displacement:
Approximately 49cc
Compression Ratio:
Varies by model year, typically around 10.0:1 or higher
Horsepower:
Generally in the range of 6.5 to 8.0 HP (specific output varies by model year and tuning)
Torque:
Estimated 7-8 Nm (specific output varies by model year and tuning)
Fuel Delivery:
Direct Injection (Ditech) with electronic control unit (ECU)
Fuel Type:
Unleaded gasoline (minimum 95 RON recommended)
Lubrication:
Automatic oil injection (pre-mix or separate oil reservoir)
Oil Change Engine:
Refer to manual for specific mileage/time intervals for engine oil and gearbox oil (if applicable).
Air Filter Cleaning:
Regular inspection and cleaning/replacement based on operating conditions, as detailed in the manual.
Spark Plug Replacement:
Recommended replacement at specified mileage intervals for optimal ignition performance.
Brake Fluid Flush:
Periodic replacement of brake fluid (e.g., every 2 years) is crucial for braking system integrity.
Engine Oil:
Refer to manual for specific 2-stroke oil grade and mixture ratio (for oil injection system).
Gearbox Oil:
Specify appropriate API GL-4 or GL-5 gear oil for the final drive, capacity typically low (e.g., 100-150 ml).
Coolant:
Use a high-quality ethylene glycol-based coolant mixture (typically 50/50 with distilled water).
Brake Fluid:
DOT 4 or DOT 5.1 is typically specified for hydraulic brake systems.
Fuel Injection System:
Potential issues with injector clogging or ECU malfunctions can occur, requiring specific diagnostic procedures outlined in the manual.
Cooling System:
Overheating can occur if the cooling system is not maintained, including leaks or faulty thermostat operation.
Cvt Belt:
Wear and tear on the CVT belt can lead to poor acceleration or slippage, requiring timely replacement.