11 groups
Parts by category.
Groups A through K, the same way the factory workshop manual is organized. If you're cross-referencing from a Haynes, you're in the same territory.
GROUP · A
Engine · Bottom End
Crankshaft & Rods · Timing Side · Drive Side · Oil Pump · Sump & Filters
5 subgroups
GROUP · B
Engine · Top End
Pistons & Rings · Cylinder Head · Valves & Springs · Cam & Tappets · Rocker Boxes
5 subgroups
GROUP · C
Carburettors & Intake
Amal Monobloc · Amal Concentric · Mikuni Conversion · Air Cleaner · Throttle & Cables
5 subgroups
GROUP · D
Ignition & Electrical
Points & Condenser · Electronic Ignition · Stator & Rotor · Wiring Harness · Lighting
5 subgroups
GROUP · E
Gearbox & Primary
Gearbox Internals · Clutch · Primary Chain · Kickstart & Shift · Cases & Covers
5 subgroups
GROUP · F
Frame & Chassis
Frame & Swingarm · Front Forks · Rear Shocks · Footpegs & Controls · Seat & Tank
5 subgroups
GROUP · G
Wheels & Brakes
Hubs & Bearings · Spokes & Rims · Tyres & Tubes · Drum Brakes · Disc Brakes
5 subgroups
GROUP · H
Exhaust
Header Pipes · Silencers · Brackets & Clamps · Heat Shields
4 subgroups
GROUP · I
Hardware & Fasteners
BSF & Whitworth · Metric Conversions · Circlips & Keys · Gaskets & Seals · Hose & Clamps
5 subgroups
GROUP · J
Tools & Workshop
Service Tools · Torque Specs · Manuals
3 subgroups
GROUP · K
Apparel & Goods
Tees · Workwear · Patches
3 subgroups