🏷️ Basic Information

Make:

Triumph

Model:

Daytona 955i / Speed Triple

Engine Variant:

955cc Inline-Triple

Year Coverage:

2002 onwards

Engine Code Prefix:

T955

👋 Introduction

Segment:

Sportbike / Naked Sportbike

Target Audience:

Enthusiast owners and independent workshops performing maintenance and repairs.

Competitors 2002 Era:

Yamaha YZF-R1, Suzuki GSX-R1000, Honda CBR900RR Fireblade, Ducati 996/998.

Engine Configuration:

Characterized by its distinctive three-cylinder, fuel-injected engine.

Design Philosophy:

A blend of potent performance with a focus on rider engagement and a unique engine character.

📋 Manual Details

Primary Coverage:

Mechanical, Electrical, and Bodywork for Triumph Daytona 955i and Speed Triple models (2002 onwards)

Specific Models Covered:

Daytona 955i, Speed Triple

Total Pages:

410

Type:

Workshop Service Manual

Language:

English

Format:

Printed

Binding Type:

Professional perfect binding (typical for this type of manual)

Paper Type:

Durable, semi-gloss paper stock to withstand workshop conditions.

Print Quality:

High-resolution printing for clear diagrams and text.

📖 Manual Coverage

Engine:

Complete engine overhaul, including disassembly, inspection, assembly, and tuning of the 955cc triple engine.

Fuel System:

Fuel injection system, throttle bodies, fuel pump, injectors, pressure regulator, and diagnostics.

Ignition System:

ECU, ignition coils, spark plugs, wiring, and troubleshooting.

Cooling System:

Radiator, fan, hoses, thermostat, coolant, and bleeding procedures.

Transmission:

Clutch operation, gearbox disassembly, inspection, assembly, and lubrication.

Frame And Suspension:

Frame inspection, front forks (dismantling, servicing, oil changes), rear shock absorber, linkage systems, and wheel bearings.

Brakes:

Front and rear brake systems, including caliper overhaul, master cylinder servicing, brake line replacement, pad changes, fluid flushing, and ABS system (if applicable).

Electrical System:

Wiring diagrams, charging system (alternator, regulator/rectifier), starter motor, battery, lighting, instrumentation, ECU diagnostics, and sensor testing.

Bodywork And Fairings:

Removal and installation of body panels, fairings, seat, fuel tank, and associated trim.

Wheels And Tires:

Wheel removal, tire fitting and balancing, spoke tension adjustment (if applicable).

Maintenance:

Regular scheduled maintenance, including oil and filter changes, chain adjustment and lubrication, air filter replacement, spark plug replacement, and brake fluid checks.

Troubleshooting:

Systematic diagnostic procedures for common and complex issues, including fault code interpretation (if applicable).

Repair:

Step-by-step instructions for component repair, replacement, and overhaul across all major systems.

Tune Up:

Engine tuning procedures, throttle body synchronization, and idle speed adjustments.

Torque Specifications:

Detailed torque values for critical fasteners throughout the motorcycle.

Depth:

Comprehensive, covering everything from basic fluid checks to full engine and gearbox rebuilds, electrical system diagnosis, and suspension servicing.

Diagnostic Capabilities:

Includes procedures for diagnosing electronic faults, sensor readings, and ECU related issues.

⚙️ Engine Specifications

Configuration:

Inline 3-cylinder, 4-stroke, liquid-cooled, DOHC, 12 valves

Displacement:

955 cc

Bore X Stroke:

74 mm x 74.4 mm

Compression Ratio:

11.1:1 (typical)

Horsepower Approx:

115-120 hp @ 9,000 rpm (depending on specific model variant and tuning)

Torque Approx:

70-75 lb-ft @ 6,500 rpm (depending on specific model variant and tuning)

Fuel Delivery:

Electronic Fuel Injection (EFI) with sequential multipoint injection

Throttle Body Size:

45 mm (typical)

Fuel Type:

Unleaded gasoline, minimum 95 RON (91 AKI)

Oil Capacity:

Approximately 3.5 - 4.0 liters (with filter change)

Oil Type Recommendation:

Fully synthetic motorcycle oil meeting API SG/SH/SJ and JASO MA specifications, typically 10W-40 or 10W-50.

🔧 Transmission

Type:

6-speed constant mesh, sequential return

Clutch:

Hydraulically actuated, wet multi-plate clutch

Final Drive:

O-ring sealed chain drive

Gear Ratios:

Specific ratios detailed in manual (e.g., 1st: 2.29, 2nd: 1.75, 3rd: 1.38, 4th: 1.16, 5th: 1.04, 6th: 0.96)

Type:

Typically shared with engine oil (JASO MA compliant motorcycle engine oil).

📐 Dimensions

Wheelbase:

Approximately 1425 - 1445 mm (model dependent)

Dry Weight:

Approximately 195 - 205 kg (model dependent)

Wet Weight Approx:

Approximately 215 - 225 kg (depending on fluids and options)

🛡️ Safety Features

NHTSA Or Euro Ncap:

Motorcycles are not typically subjected to standardized automotive crash safety ratings.

Braking System:

Dual 320mm front discs with 4-piston calipers, single 255mm rear disc with 2-piston caliper. Optional ABS available on some variants.

Suspension:

Adjustable front forks (preload, compression, rebound) and adjustable rear shock absorber (preload, rebound) for optimal handling and stability.

Lighting:

Halogen headlights and taillight, integrated turn signals.

Frame Construction:

Aluminum twin-spar frame providing rigidity and stability.

💡 Technology Features

Features:

Basic instrumentation cluster including speedometer, tachometer, odometer, trip meters, and warning lights. No advanced infotainment systems.

Features:

Optional Anti-lock Braking System (ABS) on certain configurations.

Features:

No modern connectivity features such as Bluetooth or smartphone integration.

ECU:

Engine Control Unit (ECU) manages fuel injection, ignition timing, and other engine parameters. Diagnostic capabilities via specific Triumph tools or interfaces are often required for in-depth troubleshooting.

🔧 Maintenance

Oil Filter Change:

Every 6,000 miles (10,000 km) or annually, whichever comes first.

Air Filter Check:

Every 6,000 miles (10,000 km), replace as needed.

Spark Plug Replacement:

Every 12,000 miles (20,000 km).

Coolant Change:

Every 2 years.

Brake Fluid Flush:

Every 2 years.

Chain Lubrication:

Every 300-500 miles (500-800 km) and after washing or riding in rain.

Coolant:

Ethylene glycol-based antifreeze/coolant, typically a 50/50 mix with distilled water. Refer to manual for specific Triumph coolant part number if available.

Brake Fluid:

DOT 4 hydraulic brake fluid.

Fork Oil:

Refer to manual for specific viscosity and volume, typically around SAE 10W or similar.

Common Wear Items:

Clutch plates, wheel bearings, fork seals, and regulator/rectifier (can be prone to failure).

Engine Related:

Occasional electrical gremlins, stator failure, and fuel pump issues are sometimes reported; regular maintenance mitigates many potential problems.

Suspension Related:

Fork dive during hard braking is characteristic; servicing fork oil and damping settings can improve performance.

📚 Vehicle History

Brand Focus:

Triumph Motorcycles Ltd. has a long and storied history dating back to 1902, known for its innovative engineering and distinctive engine configurations.

Heritage Lineage:

The Daytona and Speed Triple models evolved from Triumph's earlier triples, with the 955i generation representing a significant upgrade in performance and technology over its predecessors.

Key Updates 2002 Onwards:

Introduction of electronic fuel injection, updated chassis components, and refinement of the 955cc engine for increased power and torque.

Manufacturing Location:

Hinckley, Leicestershire, United Kingdom

Production Period Covered:

This manual specifically covers models from 2002 through subsequent model years that retained the 955cc engine and similar architecture.

🏆 Awards & Recognition

Critical Acclaim:

Consistently praised for its torquey triple engine, engaging handling, and distinctive styling by motorcycle publications of its era.

Performance Awards:

While specific awards vary, the platform was recognized for its potent combination of track-day capability and everyday usability.