Segment:
Cruiser / Power Cruiser segment.
Target Audience:
Owners and independent workshops seeking detailed technical information for maintenance and repair of their Triumph Rocket III.
Positioning:
The Rocket III defined a new class of motorcycle with its massive engine displacement, offering unparalleled torque and a distinctive riding experience. This manual ensures owners can maintain this unique machine effectively.
Manual Value:
Essential for preserving performance, reliability, and resale value of the Triumph Rocket III.
Content Source:
Based on official Triumph factory workshop documentation, providing authoritative information.
Powertrain:
Engine (assembly, disassembly, tuning, diagnostics), Fuel System (injection, pumps, regulators), Exhaust System, Transmission (gearbox operation, clutch, final drive).
Chassis:
Frame, Suspension (forks, rear shock), Steering, Wheels, Tires, Brakes (hydraulic system, caliper, master cylinders, pads, rotors).
Electrical:
Wiring Diagrams, Lighting System, Ignition System, Charging System (alternator, regulator/rectifier), Battery, Starter Motor, ECU, Instrumentation, Sensors.
Bodywork And Accessories:
Body panels, seat, fuel tank, fenders, handlebars, levers, footpegs, accessories installation.
Fuel System Details:
Throttle body synchronization, injector testing, fuel pressure regulation, fuel pump performance checks.
Routine Maintenance:
Oil and filter changes, air filter replacement, spark plug checks, chain adjustment (where applicable), brake fluid flush, coolant service.
Troubleshooting:
Diagnostic flowcharts for common and uncommon problems, error code explanations, symptom-based troubleshooting guides.
Major Repairs:
Engine rebuilds, gearbox overhaul, suspension fork servicing, brake caliper rebuilds, electrical component replacement.
Specifications And Tolerances:
Torque specifications for all fasteners, valve clearances, piston ring gaps, bearing clearances, electrical resistance values.
Diagnostic Procedures:
Detailed procedures for diagnosing electrical faults, engine performance issues, and chassis component malfunctions using specialized tools and knowledge.
Depth:
Extensive. Covers everything from basic fluid checks to complete engine and transmission overhauls, including detailed diagnostic procedures for the electronic control unit (ECU).
Precision Measurements:
Includes precise measurements for critical engine components like crankshaft journals, connecting rod big ends, and cylinder bores.
Engine Type:
Inline 3-Cylinder, DOHC, 12-valve
Displacement:
2294 cc (2.3 Liters)
Bore X Stroke:
101.6 mm x 94.3 mm
Horsepower:
140-147 hp (approx. depending on model year and tune)
Torque:
147-156 lb-ft (approx. depending on model year and tune)
Fuel Delivery:
Sequential multi-point fuel injection with progressive throttle control.
Fuel Type:
Unleaded gasoline, minimum 95 RON (Research Octane Number).
Cooling Method:
Liquid-cooled
Oil Type Spec:
SAE 10W-40 API SJ or higher, JASO MA approved.
Typical Engine Code Prefix:
T120 (historical), R3 (general indication)
Crash Test Data:
Not applicable (motorcycle safety is assessed differently, focus on component safety and handling).
Braking System:
Hydraulically operated dual front disc brakes (e.g., 320mm discs) and single rear disc brake (e.g., 316mm disc). Many models feature ABS.
Anti Lock Braking System:
Available on many Rocket III models (e.g., Rocket III Classic, Rocket III Touring). Specific system details in manual.
Lighting:
Halogen headlights, LED taillights and indicators on later models.
Instrumentation:
Analog tachometer and speedometer, digital odometer, trip meters, clock, fuel gauge, engine temperature warning light, gear indicator (on some models).
ABS Availability:
Available on select models and as an option on others.
ECU System:
Engine Control Unit (ECU) manages fuel injection, ignition timing, and other engine parameters. Diagnostic port for reading fault codes.
Headlight Type:
Twin headlights on early models, often updated to a single larger unit or different style on later generations.
Oil Filter Change:
Every 6,000 miles or 12 months, whichever comes first.
Engine Oil Change:
Every 6,000 miles or 12 months, whichever comes first.
Air Filter Check:
Every 6,000 miles or 12 months. Replace as needed.
Spark Plug Replacement:
Refer to manual, typically around 12,000-24,000 miles depending on plug type and usage.
Brake Fluid Flush:
Every 2 years, or as indicated by fluid condition.
Engine Oil Capacity:
Approx. 4.0 - 4.5 liters (including filter), refer to manual for exact capacity with or without filter change.
Coolant Type Spec:
Ethylene glycol-based coolant, 50% mixture with de-ionized water. Triumph recommends their own coolant or equivalent meeting BS 6580 standards.
Brake Fluid Type Spec:
DOT 4 Hydraulic Brake Fluid (refer to manual for specific DOT rating and brand recommendation).
Common Wear Items:
Clutch slave cylinder seal leaks, regulator/rectifier failure (especially on earlier models), fuel pump issues, swingarm bearings.
Maintenance Tips:
Regular lubrication of pivot points, timely replacement of wear items, ensuring proper cooling system maintenance to prevent overheating.
Manufacturer:
Triumph Motorcycles Ltd., established 1902, renowned for innovation and performance.
Variants:
Rocket III (standard), Rocket III Classic, Rocket III Roadster, Rocket III Touring. Minor updates throughout its production run (e.g., engine mapping, styling, ABS integration).
Production Period:
2004 - 2017 (original generation before Triumph Speed Triple 1200 platform influence).
Manufacturing Location:
Hinckley, Leicestershire, England.
