Vehicle Segment:
Classic British Motorcycle, renowned for its iconic styling and performance.
Historical Competitors:
Other large-capacity British twins (e.g., Norton Commando), and emerging Japanese models.
Motorcycle Legacy:
Represents a significant era in Triumph's history, continuation of the legendary Bonneville nameplate.
Manual Value Proposition:
Provides essential, in-depth technical knowledge for maintaining and restoring a valuable classic motorcycle.
Manual Coverage Scope:
Full service, repair, maintenance, rebuild, refurbishment, restoration
Estimated Page Count:
Detailed (specific page count not provided, but described as comprehensive)
Manual Classification:
Full Service Repair Manual
Print Quality:
Full Printable
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinRAR
Operating System Compatibility:
All Versions of Windows & Mac
Engine System:
Comprehensive coverage including diagnostics, repair, and rebuilding of the Bonneville's twin-cylinder engine.
Transmission System:
Detailed procedures for transmission maintenance, repair, and troubleshooting.
Electrical System:
In-depth coverage including troubleshooting, wiring diagrams, and electrical component service.
Fuel System:
Details on carburetor adjustment, fuel lines, and fuel tank maintenance.
Brake System:
Information on hydraulic disc brake system maintenance and repair.
Suspension System:
Coverage of front forks and rear shock absorber maintenance and adjustment.
Cooling System:
While air-cooled, coverage includes general engine thermal management.
Exhaust System:
Procedures for exhaust system inspection and maintenance.
Frame And Bodywork:
Guidelines for frame inspection and minor bodywork repairs.
Ignition System:
Details on the magneto or electronic ignition system (depending on specific T140V sub-variant), including troubleshooting and timing.
Lighting System:
Headlight, taillight, turn signals, and brake light operation and maintenance.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug service, brake adjustments.
Diagnostic Procedures:
Troubleshooting common mechanical and electrical faults.
Repair Procedures:
Step-by-step guidance for component repairs and replacements.
Rebuilding Procedures:
Detailed instructions for engine and gearbox rebuilds.
Refurbishment Procedures:
Guidance for restoring worn or aging components.
Electrical Troubleshooting:
Combined with wiring diagrams for ease of diagnosis.
Lubrication Schedule:
Specific lubrication points and intervals.
Tightening Torques:
Crucial torque specifications for various fasteners.
Carburetor Rebuild:
Detailed procedures for dismantling, cleaning, and reassembling Amal carburetors.
Engine Rebuild Steps:
Piston replacement, ring installation, bearing checks, crankshaft inspection.
Wheel And Tire Service:
Information on spoke tightening, wheel balancing, and tire replacement.
Chassis Lubrication:
Points for greasing and lubrication of suspension pivots and cables.
Diagnostic Capabilities:
Professional technician level diagnostics for mechanical and electrical systems.
Repair Complexity:
Covers everything from basic adjustments to full engine and gearbox rebuilds.
Documentation Style:
Detailed sub-steps, notes, cautions, warnings, numbered instructions, bold figure numbers.
Illustration Quality:
Detailed illustrations, drawings, and photos with enlarged inset views for critical components.
Target Audience:
Primarily professional technicians, but adequate for DIY mechanics.
Engine Type:
Air-cooled, parallel-twin, 4-stroke.
Displacement:
744 cc (45.4 cubic inches)
Bore X Stroke:
71.0 mm x 93.0 mm (2.79 in x 3.66 in)
Compression Ratio:
Typically around 7.9:1 (varies slightly by market/tune)
Valve Train:
OHV (Overhead Valve) with pushrods
Horsepower Rating:
Approximately 50-55 bhp (brake horsepower) at 6,500 rpm (estimated, specific rating varies).
Torque Rating:
Around 44-47 lb-ft (pound-feet) at 5,000 rpm (estimated).
Carburetors:
Typically twin Amal concentric carburetors (e.g., 30mm or 32mm).
Fuel Type:
Unleaded gasoline (though leaded was common in period; manual may cover both or recommend additives).
Oil Change Interval:
Typically every 2,000-3,000 miles (3,000-5,000 km), or annually. Manual will specify.
Valve Clearance Check:
Recommended at initial service and then every 4,000-6,000 miles (6,000-10,000 km).
Engine Oil Type:
API SG or higher, SAE 20W-50 or SAE 10W-40 motorcycle-specific oil (consult manual for precise recommendations based on climate).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (for disc brakes).
Common Wear Items:
Cam chain wear, clutch basket wear, primary chain adjusters, gearbox output shaft seals, electrical connections, Amal carburetor tuning.
Electrical Reliability:
Can be a point of concern; manual's wiring diagrams and troubleshooting are crucial.
Gasket Leaks:
Potential for minor oil leaks from crankcase seals and head gaskets due to age.
