Aprilia SR 50 / SR 50 SP / SR 50 R Scooter Service Manual

This Aprilia SR 50 service manual covers 50cc models from 1997-1999 with procedures for engine, chassis, electrical systems, and maintenance. Manual #8140212

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Document Details

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Document Number / Seller:
31831 / David Cooper
File Size:
8.57 MB
File Type:
PDF
Language:
English, Italian, Spanish
Pages:
193
Printable:
Yes
Category:
Scooter
Last updated / verified
Jan 12, 2026

Models Covered & Key Technical Specifications

Aprilia SR 50 / SR 50 SP / SR 50 R (50cc) Service Manual Covers Aprilia SR 50, SR 50 SP, SR 50 R models (1997–1999) with detailed procedures for maintenance, repair, and troubleshooting.

  • Technical Data: Engine: MINARELLI 2-stroke. Bore x Stroke: 40 mm - 39.2 mm.
  • Capacities: Fuel Tank: 8 Liters (including reserve). Transmission Oil: 110 cm³.
  • Cooling System: Forced air cooling. Liquid cooled versions also available.
  • Brakes: Front: Disc Ø190 mm hydraulic transmission. Rear: Drum Ø110 mm mechanic transmission or Disc Ø190 mm hydraulic transmission.
  • Tyres: Front: 130/60 - 13" 53J. Rear: 130/60 - 13" 53J.
  • Ignition: C.D.I. with fixed advance. Spark advance: 14° ± 2° before T.D.C.

Manual Description & Preview

Aprilia SR 50 Scooter Service Manual: 1997-1999 | Reference Data

Year-Coverage: 1997-1999 // Operational-Framework: Scooter / 50cc Logic // Design-Core: Air and Liquid Cooled Systems. Service sections detail the following systems and procedures: Engine (MINARELLI 2-stroke), Fuel System (carburetor, fuel tank), Cooling System (liquid cooled), Brakes (disc/drum), Wheels & Tyres, Transmission, Electrical System, and Troubleshooting.

Service sections detail the operation and repair of all major systems, including:

  • Engine troubleshooting and maintenance procedures.
  • Fuel system inspection, carburetor adjustment, and fuel tank removal.
  • Cooling system maintenance, including coolant checks and replacement.
  • Brake system service, including pad replacement and brake fluid checks.
  • Wheel and tyre inspection, including balancing and pressure checks.
  • Transmission oil level check and replacement.
  • Electrical system diagrams, component locations, and troubleshooting guides for lighting, ignition, and indicators.

Includes torque specifications for critical components to ensure proper assembly and system function.

FAQ

What **calibrated** system architecture values are specified in this manual? keyboard_arrow_down

14° ± 2° BTDC is the specified spark advance for Aprilia ignition architectures, ensuring precision timing across all SR 50 variants.

Assess the **applicable** tool requirements for common maintenance tasks. keyboard_arrow_down

Common tools mentioned include hexagon wrenches, screwdrivers, a specialized pipe clamp, and a torque wrench for precise fastener tightening.

What **exact** electrical values are outlined for system diagnostics? keyboard_arrow_down

For a functioning coolant sensor, values of approximately 226 ± 50 Ohms at 50°C are specified, requiring a pocket tester (ohmmeter) for accurate measurement.

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