1993-2002 Aprilia RS 125 Service Manual (291 P.)

Engine diagnostics, carburetor tuning, and suspension service for RS 125 (ZD4DW): compression settings, fuel specifications, cooling system capacities. Complete shop procedures.

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Document Details

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Document Number / Seller:
23355 / David Taylor
File Size:
18.78 MB
File Type:
PDF
Language:
English (some of our manuals are multi-language)
Pages:
291
Printable:
Yes
Category:
Motorbike
Last updated / verified
Dec 25, 2025

Models Covered & Key Technical Specifications

Aprilia RS 125 (ZD4DW) — 1993-2002 Functional Technical Index for Specifications Container.

  • Factory Tightening Data: 124.82 cu. cm (54 mm bore × 54.5 mm stroke) is standardized to the cylinder displacement Benchmarks.
  • Essential Fill Levels: For combustion efficiency, 12.5 ± 0.5:1 compression ratio is rated at the cylinder head pressure Range.
  • Key Tolerance Values: The alternator generator governs 12 V - 180 W electrical system output Sequences.
  • Verified Amperage Specs: 0.6 l (SAE 30) sets the two-stroke engine separate lubrication capacity Baseline.
  • Designated Feed Speed: Ready-for-starting weight defines 139 kg with fuel and fluids included Requirements.
  • Approved Bolt Torques: Cooling system capacity specifies 0.8 l (50% water + 50% ethylene glycol coolant) Threshold.

Professional Workshop Service Manual & Technical Specifications

Professional Reference Documentation Manual: Aprilia RS 125 1993-2002 Service & Workshop Logic-Archive

Technical-Domain: Aprilia RS 125 (ZD4DW) 1993-2002 // Model-Designation: Single-cylinder Two-stroke / Liquid-cooled Sportbike // Engineering-Metrics: 124.82 cu. cm displacement, 12V electrical system, 291-page comprehensive coverage.

Documentation Category Chapter Coverage Reference Status
Procedural Specifications Engine systems, transmission, cooling architecture Complete specifications provided
Component Reference Chassis assembly, brake systems, electrical circuits Documented in detail
Maintenance Scheduling Service intervals and lubrication requirements All intervals included

Technically mandating precision across all mechanical functions, repair procedures are structured around general information protocols, routine maintenance operations, lubrication system architecture, fuel delivery mechanisms, cooling apparatus documentation, engine component specifications, chassis assembly sequences, and electrical system diagrams. Each section acknowledges transmission control interfaces, brake hydraulic circuits, suspension linkage geometry, and wheel assembly procedures while emphasizing the document provides reference data rather than instructional sequences.

Fuel system procedures are documented for carburetor configuration parameters, air intake filtration, and tank removal access points. Adjustment procedures are detailed for clutch lever free play, throttle cable tension, idle speed reference values, and rear brake control lever positioning. Timing procedures are documented for ignition advance settings and spark plug gap specifications. Technical notes are provided for battery maintenance protocols, brake pad wear assessment thresholds, and coolant mixture composition ratios. Quality checks are addressed for steering bearing play verification, front fork compression smoothness, rear swinging arm spindle clearance inspection, and drive chain slack measurement ranges.

The manual documents torque specifications for fastening components to ensure proper assembly verification across engine mounting points, suspension attachment locations, and brake system securing hardware. Structured coverage encompasses 291 pages organized across 9 major sections detailing foreword information, general identification data, routine service intervals, lubrication point charts, fuel system architecture, cooling system operation, engine component layout, chassis structural elements, and electrical circuit schematics alongside comprehensive troubleshooting reference matrices.

FAQ

Check the **standard** spark plug gap setting? keyboard_arrow_down

0.7 - 0.8 mm is the required gap specification for proper ignition performance on the RS 125 engine.

What does the **necessary** oil capacity for the gearbox equal? keyboard_arrow_down

600 cu. cm represents the total gearbox oil capacity for both standard and full-power versions of this motorcycle.

Reference the **recommended** front fork oil quantity specification? keyboard_arrow_down

430 ± 2.5 cu cm per fork leg is the precise oil fill requirement for maintaining proper suspension damping and performance.

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I received the download link almost immediately after purchase. The service manual is thorough and very helpful!
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The troubleshooting section saved me a lot of time and hassle. Plus, the download was seamless!
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I was pleasantly surprised by how quick and professional the support team was when I needed help. Highly satisfied!
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This manual has been a game changer for my maintenance routine. The detailed illustrations make it easy to follow along!
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Rated 5 out of 5 stars