1945-1955 1945–1955 Speed Twin (5T), Thunderbird (6T), Trophy (TR5), and Tiger (T100/T110) Workshop Manual (PN 99-0836)
213 Pages • 13.34 MB • Instant, Printable PDF
Triumph Models Covered & Key Technical Specifications
Models: Speed Twin (5T), Thunderbird (6T), Tiger 100 (T100), Tiger 110 (T110), Trophy (TR5), 3T De-Luxe
Sub-models / Variants: Rigid Frame, Swinging Arm, Solo, Sidecar
Trade Names: Triumph Motorcycles, Meriden Works
Model Years: 1945–1955
Serial Numbers: Example: 6T-93264 (stamped on L.H. crankcase below cylinder base flange)
Technical Data:
- Engine Configuration: O.H.V. Twin
- Cylinder Displacement: 30.5 cu. in. (498 c.c.) for 500cc models; 40 cu. in. (649 c.c.) for 650cc models
- Max Power Output: 27–42 bhp at 6,300–6,500 rpm
- Compression Ratios: 7:1 to 8.5:1
- Bore Specifications: 2.48 ins. (63 mm.) to 2.79 ins. (71 mm.)
- Stroke Specifications: 3.15 ins. (80 mm.) to 3.23 ins. (82 mm.)
- Fuel Tank Capacity: 3 to 4 gallons (13.68–18 liters)
- Unladen Weight: 365–395 lbs. (165–179 kg)
Triumph Manual Features & Content Preview
- Official 213-page Triumph Engineering Co. Ltd. publication (Part No. 99-0836, originally published April 1964).
- Covers 1945–1955 Speed Twin (5T), Thunderbird (6T), Trophy (TR5), and Tiger (T100/T110) models.
- Features 36 detailed exploded-view diagrams, technical component indexes, and 12 engine/transmission timing charts.
- Serves as the definitive reference for vintage British motorcycle repair, documenting both rigid and swinging arm variants.
Engine and Transmission Walkthrough
This factory documentation delivers exact technical specifications for the Triumph O.H.V. twin engine platform. Chapters detail the complete dismantling, inspection, and assembly sequences for the crankcase, crankshaft, connecting rods, and cylinder head assemblies. You will find critical clearance data for valve timing alongside piston ring gaps. The text also outlines lubrication system maintenance, explaining the inner workings of the twin plunger oil pump and the indicator system.
Need to overhaul the drivetrain? The transmission section focuses on the four-speed gearbox operation. It details the gear selection mechanism, camplate function, and clutch assembly. Shop technicians will find practical data on primary chaincase maintenance and exact sprocket configurations for sidecar or solo setups. Furthermore, it covers the necessary procedures for handling mechanical breathers, timing gears, and the characteristic alternator or magneto ignition systems of this era.
Technical Data Preview
Precision is critical when machining or assembling these vintage twins. Specification highlights include specific compression ratios of 7:1 to 8.5:1 and bore-to-stroke ratios for various 500cc and 650cc engines. Total engine displacement is listed at 498 cc (30.5 cu in). Throughout the assembly sections, cylinder head bolt torque is documented at 18 ft. lbs.
In the primary chaincase specification table, primary chain adjustment is listed at 1/2 inch. For advanced ignition schedules, crankshaft timing for the TR5 and T110 is set at 35° B.T.C. While this manual provides the exact factory tolerances necessary for a successful repair, working on vintage engines involves inherent mechanical and chemical hazards. Always follow standard workshop safety protocols and verify your tools are calibrated before applying critical torque values.
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