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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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Aprilia Models Covered & Key Technical Specifications

Models: Aprilia SR 50, Aprilia SR 50 SP, Aprilia SR 50 R
Sub-models / Variants: Liquid-cooled, Catalytic, Drum brake
Build Years: 1997–1999
Technical Data:

  • Engine: Minarelli 2-stroke, horizontal single-cylinder
  • Displacement: 49.26 cc
  • Bore x Stroke: 40 mm x 39.2 mm
  • Compression Ratio: 12.5 ± 0.5:1
  • Transmission: Automatic stepless variator
  • Cooling: Forced air or liquid-cooled
  • Fuel Tank Capacity: 8 liters (including 2-liter reserve)
  • Spark Plug: NGK BR7 HS or NGK BR8 HS
  • Front Suspension: Hydraulically operated telescopic fork (90 mm stroke)
  • Rear Suspension: Hydraulic mono-shock absorber (75 mm stroke)
  • Front Brake: 190 mm hydraulic disc
  • Rear Brake: 110 mm mechanical drum or 190 mm hydraulic disc
  • Tire Size: 130/60 - 13" 53J
  • Idle RPM: 1800 ± 100 rpm
Technical Specifications
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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

Aprilia Manual Features & Content Preview

Aprilia SR 50 Service Manual: Technical Scope

  • Covers 1997–1999 Aprilia SR 50, SR 50 SP, and SR 50 R scooters with Minarelli 2-stroke engine variants
  • Original OEM publication part # 8140212, second edition June 1999
  • Contains 193 pages of maintenance data, including 15 pages of technical specifications, chassis diagrams, and electrical system schematics
  • Re-download the file any time, no expiration
  • OCR text layer lets you jump to a torque spec by keyword
  • This is the official Aprilia service documentation required for factory-level maintenance, featuring expanded coverage for the SR 50 liquid-cooled and catalytic configurations compared to base model manuals

Service and Maintenance Documentation

The 1997–1999 Aprilia SR 50 service manual provides structured data for chassis, engine, and electrical systems. It outlines general safety rules, service intervals, and system component layouts for the SR 50, SR 50 SP, and SR 50 R models. The documentation covers fuel system components, cooling system maintenance, and braking system service for both drum and disc configurations, alongside comprehensive troubleshooting charts for engine starting issues and performance concerns.

Technical Data and Specifications

This publication includes detailed specification tables for the Minarelli powerplant, covering bore, stroke, and compression ratios. Standard torque values for ISO metric threads and model-specific fastener torque settings are documented in Nm and kgm for consistent assembly. Coolant capacities are listed at 1.2 liters for liquid-cooled units, and transmission oil capacity is specified at 110 cm³. Additional reference data includes tire inflation pressures for both solo and passenger configurations, spark plug gaps of 0.5–0.6 mm, and electrical fuse ratings of 7.5 A.

All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. what an OEM service publication covers

An official 193-page Aprilia OEM workshop manual covering the 1997–1999 SR 50, SR 50 SP, and SR 50 R, documenting engine, chassis, electrical, and cooling system specifications for the Minarelli-powered build.

Manual FAQ, Purchase & Download Details

Does this manual cover the engine and cooling system for the Aprilia SR 50? keyboard_arrow_down

Manual includes dedicated chapters for the engine and cooling system, which contain specification tables, lubricant charts, and technical data for the liquid-cooled versions.

What is the document identity for this Aprilia SR 50 service manual? keyboard_arrow_down

Document is identified as the Aprilia service and repair manual with part number 8140212. It covers the SR 50, SR 50 SP, and SR 50 R models produced between 1997 and 1999.

Which specific technical data and capacity tables are listed in the manual for the SR 50? keyboard_arrow_down

Technical specification tables list data such as fuel tank capacity, transmission oil volume, spark plug gap, engine idle rpm, and standard driving torques for metric ISO fasteners.

Can I find wiring schematic references and electrical component details within this document? keyboard_arrow_down

Manual contains an electrical system chapter that lists connector pinout information and electrical component specifications. It includes data for bulbs, fuses, and generator output to help identify the electrical layout of the scooter. These sections reference the various electrical systems present in the SR 50, SR 50 SP, and SR 50 R model variants.

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