1956-1962 Triumph Thunderbird / Tiger 100 / Trophy / Bonneville Workshop Manual (194 P.)

Triumph 1956–1962 Workshop Instruction Manual

• Covers 1956–1962 Triumph Speed Twin, Thunderbird, Tiger 100, Tiger 110, Trophy TR5, Trophy TR6, and Bonneville T120 motorcycles
• Official Triumph Engineering publication No. 17, reprinted November 1973
• Contains 36 detailed exploded-view component diagrams and indexed parts lists for major engine and transmission assemblies
• 194-page document delivered as a direct download the moment payment clears
• Full-text search finds any part number in seconds
• This 1956–1962 edition documents the factory-specified maintenance routines required for the transition from earlier 500cc engines to the high-performance 650cc twin platform

Engine and Transmission Technical Overview

This manual details the mechanical systems of Triumph twin-cylinder motorcycles from 1956 through 1962. It provides technical descriptions for the dry-sump lubrication system, including pump operation and pressure relief valve maintenance. The text explains the teardown and assembly of the crankcase, crankshaft, and connecting rod groups. Engine data includes valve timing diagrams, ignition setup for both magneto and coil systems, and carburetor specifications for Amal Monobloc units. Gearbox information covers the positive-stop selection mechanism and clutch shock absorber unit adjustments.

Maintenance and Specification Data

Comprehensive maintenance tables specify service intervals for oil changes, chain adjustment, and steering head race lubrication. The manual provides identification data for proprietary equipment including Amal carburetors, Lucas electrical systems, and Dunlop tires. Inlet valve clearance for the T110 is documented at 0.002 inches. Engine oil capacity for the primary system is specified at 5 pints. The Bonneville T120 ignition timing is set at 39° before T.D.C. for optimal performance. This is what an OEM service publication covers for these classic British machines. Official Triumph workshop documentation covering 1956–1962 twin-cylinder motorcycles, including the Speed Twin, Thunderbird, Tiger 100, Tiger 110, Trophy, and Bonneville models, featuring technical engine specifications and service protocols.