2002-2004 Triumph Daytona 955i / Speed Triple Service Manual (P/N 3850595)

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Triumph Models Covered & Key Technical Specifications

Models: Triumph Daytona 955i, Triumph Speed Triple

Sub-models / Variants: Twin Sided Swinging Arm, Single Sided Swinging Arm, California models

Years: 2002–2004

Serial Numbers: VIN 144667 (Speed Triple split), VIN 144668 (Speed Triple split)

Technical Data:

  • Engine configuration: 3 Cylinder 12 Valve DOHC Transverse In-line

  • Engine displacement: 955 cc

  • Max Power (Daytona): 149 PS @ 10700 RPM

  • Max Power (Speed Triple): 120 PS @ 9100 RPM

  • Max Torque: 100 Nm @ 5100 RPM (Speed Triple), 100 Nm @ 8200 RPM (Daytona)

  • Compression Ratio: 12.0:1

  • Transmission: 6 Speed Constant Mesh

  • Cooling System Capacity: 2.8 Liters

  • Battery Type: GS GTX14-BS, 12V 12 Amp hour

  • Spark Plug: NGK-CR9EK (0.7 mm gap)

Technical Specifications
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Document Number / Seller:
24243 / Emily Thomas
File Size:
16.41 MB
File Type:
PDF
Language:
English
Pages:
410
Printable:
Yes
Category:
Motorbike
Last updated / verified
Jun 25, 2026

Triumph Manual Features & Content Preview

This official Triumph factory publication (P/N 3850595, Issue 2, July 2003) is the exact reference used by dealership technicians for the 2002–2004 Daytona 955i and Speed Triple. It outlines the precise engineering specifications for the 955cc inline-three engine and covers both single-sided and twin-sided swinging arm setups.

Technical Documentation

The manual delivers hard data on engine teardown and assembly, clutch maintenance, balancer shaft timing, and cooling system parameters. It maps out the complete engine management system, wiring schematics, and suspension baselines for the 955cc platform.

Working on the 955i requires serious attention to detail. Components like the cylinder head and timing systems demand strict adherence to specific torque procedures. Always secure the motorcycle on a professional-grade paddock stand and use calibrated torque wrenches to prevent component damage or personal injury.

Specification Highlights

This 410-page factory reference cuts through the guesswork with clear technical benchmarks:

  • Engine Cooling: Total system capacity listed at 2.8 liters.
  • Valve Train: Intake clearances defined at 0.10–0.20 mm.
  • Assembly Data: Multi-stage cylinder head bolt torque sequences, including the final-stage 90° turn for proper clamping force.
  • Diagrams: Features 8 exploded-view drawings for the cylinder head and clutch, plus 5 system-specific torque tables.

Workshop Utility

Built as a direct technical reference rather than a basic instructional guide, this manual provides the unedited factory data needed for serious garage work. It delivers the most accurate engine management and transmission specs released during the 2002–2004 production run, giving professional mechanics and experienced DIYers exactly what they need for precise servicing.

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.

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