1975 Norton 850 Commando Mark 3 Workshop Manual (200 P.)
Documents the 850 Commando Mark 3 electric-start model with complete engine, transmission, brake, and electrical system service procedures plus maintenance tables. Reference: Publication 00-4224.
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Sample pages from the 1975 Norton 850 Commando Mark 3 Workshop Manual (200 P.) manual
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Norton Models Covered & Key Technical Specifications
Models: Norton 850 Commando Mark 3
Sub-models / Variants: Interstate, Roadster, Hi-Rider (USA and Canada only), Interpol
Build Years: 1975
Serial Numbers: Commencing at Engine No. 325001, Frame No. F125001
Technical Data:
- Engine displacement: 828 cc (50.5 cu in)
- Compression ratio: 8.4:1
- Max torque: 56 lb-ft at 5,000 rpm
- Valve lift (intake/exhaust): 0.375 in (9.525 mm)
- Front fork oil capacity: 150 cc (5 fl oz) per leg
- Primary chaincase oil capacity: 200 cc (7 fl oz)
Norton Manual Features & Content Preview
1975 Norton 850 Commando Mark 3 Technical Documentation
- Covers the 1975 Norton 850 Commando Mark 3 with electric start, including Interstate, Roadster, Hi-Rider, and Interpol configurations
- Official Norton Triumph International publication No. 00-4224, dated 1975
- Contains 56 detailed exploded-view diagrams, 27 torque specification tables, and a full illustrated electrical wiring layout
- File downloads to your account within seconds of checkout
- Unlimited re-downloads tied to the purchase record
- No DRM restrictions on the print function
- Indexed PDF search covers every chapter and appendix
- This 1975 first edition is the definitive reference for the electric-start, left-foot-shift Mark 3 build, documenting the transition from earlier rigid-mounted designs
Manual Coverage and Engine Systems
The 1975 Norton 850 Commando Mark 3 workshop manual provides technical documentation for the complete powertrain, including the air-cooled 828 cc engine and the Mark 3 specific electric start mechanism. Detailed sections cover cylinder head servicing, decarbonizing procedures, valve guide replacement, and crankshaft reassembly sequences. The text documents specialized transmission servicing, detailing the 4-speed gearbox internals, selector fork inspection, and the primary drive assembly for the left-foot-shift model. Lubrication system data, including the oil pump and anti-leak valve modifications unique to this series, are fully detailed for maintenance and overhaul.
Specifications and Dimensional Data
Technical data is presented across comprehensive tables covering all major motorcycle systems, including chassis, engine, and electrical specifications. The manual provides tightening torques in both lbf/ft and kg/m for engine mounts, cylinder head bolts, and crankshaft components. Valve clearance for the intake is listed at 0.006 in in the cylinder head specification table. Front fork oil capacity for the 1975 Norton 850 Commando Mark 3 is documented at 150 cc per leg. Ignition timing for the fully advanced position is specified at 28° BTDC. This publication functions as the primary technical reference for the 1975 Norton 850 Commando Mark 3, documenting engine, chassis, and electrical specifications essential for the restoration and maintenance of this classic British motorcycle series.
Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions.
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