Target Audience:
Mechanics and DIY enthusiasts seeking to maintain, repair, or restore their Triumph Twenty One T21.
Value Proposition:
Provides comprehensive, detailed, and easy-to-understand repair information crucial for owning and maintaining a classic Triumph motorcycle.
Delivery Method:
Instant Download, offering immediate access without shipping delays or costs.
Vehicle Years Covered:
1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966
Type:
Workshop Service Repair Manual
Engine:
Detailed information on engine disassembly, assembly, overhaul, specifications, and troubleshooting.
Transmission:
Procedures for removal, installation, overhaul, and adjustments of the gearbox and associated components.
Fuel System:
Carburetor tuning, fuel tank, fuel lines, and fuel pump servicing.
Electrical System:
Wiring diagrams, ignition system, lighting, battery, generator/alternator, and starter motor troubleshooting.
Brakes:
Hydraulic brake system servicing, including master cylinder, wheel cylinders, brake shoes, and lines.
Suspension:
Front fork assembly, rear shock absorbers, and associated bushings and bearings.
Frame And Body:
Frame inspection, body panel removal and installation, seat, and other trim components.
Controls:
Handlebar controls, throttle, clutch, and brake levers, cables, and linkages.
Maintenance:
Regular maintenance tasks, including lubrication, filter changes, and fluid level checks.
Troubleshooting:
Diagnostic guides for common problems and their solutions, including symptom-based diagnosis.
Disassembly Assembly:
Step-by-step instructions for taking apart and reassembling all major vehicle components.
Repair Rebuild:
Comprehensive procedures for repairing and rebuilding all systems and components.
Adjustments:
Detailed instructions for performing all necessary adjustments, including carburetor, ignition timing, and clutch.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine rebuilds and advanced diagnostics.
Diagrams:
Includes detailed exploded diagrams, pictorial diagrams, and photographs to guide repairs.
Special Tools:
References specific special service tools required for certain procedures, often with illustrations of their use.
Specifications:
Provides critical specifications such as torque values, clearances, wear limits, and fluid capacities.
Quality:
High-resolution PDF, ensuring clear visibility of text and diagrams.
Searchable:
Likely text-searchable, facilitating quick access to specific information.
Printability:
Yes, all pages are printable, allowing for convenient use at a workbench.
Binding:
N/A (Digital PDF)
Paper Quality:
N/A (Digital PDF)
Operating Systems:
Windows, Mac, Linux OS
Software Requirement:
Adobe Reader
Type:
Air-cooled, 2-cylinder, 4-stroke, parallel-twin (Specific displacement and configuration details would be within the manual itself).
Horsepower Range:
Typically in the range of 15-20 bhp for this era of Triumph twins (exact figure varies by specific tune).
Torque Specifications:
Detailed torque values for critical engine components like cylinder head nuts, main bearings, and connecting rods are provided in the manual.
Carburetion:
Typically single Amal carburetor, with detailed settings, jetting, and overhaul instructions.
Oil System:
Wet sump lubrication, with specific oil capacities and recommended lubricant types (e.g., SAE 20W50 or similar).
Type:
4-speed constant mesh gearbox.
Variations:
Generally consistent across the production run, but internal ratios might have minor changes.
Clutch:
Wet multi-plate clutch, with servicing, adjustment, and replacement procedures.
Final Drive:
Chain drive with oil bath primary chaincase.
Crash Test Results:
N/A (Motorcycle from the era, not subjected to modern crash testing standards).
Braking System:
Drum brakes front and rear, with detailed inspection and service procedures.
Lighting:
Headlight, taillight, brake light, turn signals (depending on market and year), with troubleshooting for electrical issues.
Oil Change:
Typically every 3,000 miles or 12 months, with specific recommendations in the manual.
Ignition Timing:
Periodic checks and adjustments as per manual recommendations.
Valve Clearance:
Recommended intervals for checking and adjusting valve clearances.
Engine Oil:
Specific viscosity grade and API service classification for engine oil will be detailed (e.g., SAE 20W50, API SF or equivalent).
Gearbox Oil:
Type and quantity of oil for the primary chaincase and gearbox.
Brake Fluid:
DOT 3 or DOT 4 brake fluid is typically recommended for hydraulic systems of this era, as specified in the manual.
Common Problems:
Potential issues could include oil leaks from the crankcases, clutch wear, carburetor tuning difficulties, and electrical component failures. The manual provides diagnostic guidance for these.
Preventative Measures:
Adherence to the maintenance schedule, using correct lubricants, and prompt attention to unusual noises or performance changes are key, as emphasized in the manual.
Manufacturer:
Triumph Engineering Co. Ltd., a historic British motorcycle manufacturer.
Significance:
The Twenty One was a popular and accessible model for Triumph, known for its reliability and usability, serving as an entry-level twin.
Manufacturing Location:
Meriden Works, Coventry, England.
Key Changes 1959-1966:
Minor updates may have occurred over the years, such as changes to the Amal carburetor, ignition system, or minor styling elements, all detailed within the manual.
