Norton Twin Cylinder Re-Build Manual – Lightweight and Heavyweight Twins
Download the complete PDF version using the green download button at the top right of this page for a detailed Norton twin-cylinder rebuild manual covering both Lightweight and Heavyweight Twin models. This workshop reference includes material for the Jubilee, Navigator and Electra, together with the Model 88, Model 99, 650SS, 750 Atlas and 750 G15 CS, providing a broad mechanical guide for engine service, transmission work, chassis maintenance, carburettor setup and electrical system checks.
The manual begins with lubrication and routine maintenance guidance before moving into Heavyweight Twin engine service, including cylinder head removal, valve work, piston and ring fitting, rocker adjustment, ignition timing, timing cover refitting and major engine overhaul procedures. It also includes exploded engine drawings, crankshaft dismantling, crankcase work, bearing removal, connecting rod assembly and engine reassembly information.
Further sections cover Lightweight Twin models, transmission servicing, clutch adjustment, gearbox layouts, chains, wheels, brakes, front forks, frames, swinging arms, carburettor service and electrical testing. The later pages provide Lucas electrical material, battery notes, contact breaker and distributor information, rectifier checking, ignition coil service and wiring-related guidance, making this a valuable rebuild and maintenance resource for a wide range of Norton twin-cylinder motorcycles.
Contents Include
- Norton twin-cylinder rebuild reference for Lightweight and Heavyweight models
- Jubilee, Navigator, Electra, 88, 99, 650SS, Atlas and G15 CS coverage
- Lubrication, oil circulation and routine maintenance guidance
- Cylinder head, valves, pistons, rings and rocker service
- Ignition timing, timing covers and camshaft-related procedures
- Major engine overhaul, crankshaft and crankcase work
- Heavyweight and Lightweight Twin exploded engine diagrams
- Transmission, clutch, gearbox and chain service sections
- Wheels, brakes, forks, hubs, frames and swinging arm information
- Carburettor service and adjustment guidance
- Lucas electrical, battery, rectifier and ignition service material
- Workshop photographs, diagrams and rebuild illustrations
