Triumph Bonneville 750 T140V and Tiger 750 TR7RV 1976–1977 Parts Catalog (P/N 99–2257)

• Covers 1976–1977 Triumph Bonneville 750 T140V and Tiger 750 TR7RV, detailing factory part assemblies for both dual and single-carburetor setups
• Official Triumph publication P/N 99–2257 (Revised August 1976)
• Features 34 highly detailed, exploded-view mechanical illustrations across 90 pages of part number listings
• The definitive source for engine identification from serial number 62501 onward
• Outlines OEM component breakdowns for Amal Concentric 930 carburetors, RM21 alternators, Zener diodes, contact breakers, auto-advance units, telescopic front forks, and twin seats
• Details factory part numbers for oversize piston sets, valve guide sets, wiring harnesses, tachometer gearboxes, timing gears, toolkits, and exhaust pipes

Component Directory and Assembly Structure

Whether you are performing a ground-up restoration, an authentic repair, or just tracking down a specific piece of hardware, this PDF parts catalog breaks down the 1976–1977 Bonneville 750 and Tiger 750 by their factory-specified components. Each section organizes mechanical systems logically, detailing sub-assemblies for the crankcase, oil pump, and valve train, while pinpointing the exact hardware, gaskets, and seals required.

While a factory parts catalog does not provide written step-by-step procedures, the sequential exploded-view illustrations serve as intuitive visual guides. By displaying the exact stacking order of gears, bearings, and circlips, these assembly drawings and component views allow you to confidently rebuild complex systems—such as the five-speed transmission or the telescopic front forks—at home, effectively saving you from expensive vintage motorcycle workshop labor.

You will also find clear breakdowns for the five-speed gearbox, clutch assembly, and primary chain drive systems. Front and rear brake components, including master cylinder kits, are mapped out for both model variants. For those looking to source OEM-correct replacements for fuel, electrical, and suspension systems during extensive troubleshooting, this detailed parts documentation for vintage Triumph provides the exact numerical identifiers needed. To further assist your work, the catalog features specialized visual aids, including Amal carburetor diagrams, gearbox assembly drawings, oil pump views, wiring harness diagrams, standard hardware charts, and suspension unit schematics.

A distinct workshop advantage of this specific manual is the inclusion of the comprehensive standard hardware specification tables. Instead of measuring thread pitches on classic British machinery by trial and error, technicians can instantly verify Unified Thread Form (UNF/UNC) sizes, hex dimensions, and under-head lengths. This entirely prevents stripped threads in delicate aluminum engine casings.

Important safety note: Always observe standard workshop safety procedures, use appropriate lifting equipment for heavy engine blocks, and ensure proper ventilation when working with fuel system components.

Specification Highlights

Beyond standard part numbers, this manual serves as a reliable reference for critical drivetrain and engine identification data.

• Compression ratios are clearly documented: 8.6:1 for US-market machines and 7.9:1 for UK and European models.
• Main jet sizing is specified at 270 for the TR7RV and 190 for the T140V carburetor configurations.
• Gearbox sprocket tooth count for the five-speed drivetrain is listed at 20 teeth.
• Primary oil tank capacity is set at 4.8 U.S. pints in the lubrication data table.

With 90 pages of factory-correct data, this Triumph OEM parts catalog gives technicians and DIY mechanics the structural blueprints required to maintain, service, and restore these classic British twins.