Positioning:
Positioned as the 'BEST manuals on Tradebit', emphasizing completeness and professional quality, contrasting with cheaper, incomplete versions.
Competitors:
Directly competes with other service repair manuals, factory workshop manuals, and CDROM manuals, claiming superiority in completeness and detail.
Value Proposition:
Saves money on repair bills, empowers vehicle owners to perform maintenance and repairs, provides professional-grade resources.
Ease Of Use:
Easy to use on PC, Tablet, or Laptop; instant access for immediate repair commencement.
Models Covered:
All models and variants of the Norton 850 CommandO MARK 3 from 1975 onwards.
Repairs Covered:
A-Z comprehensive repairs and maintenance.
Scope:
Covers the entire vehicle from front to back, a comprehensive resource for any repair or maintenance task.
Estimated Page Count:
Greater than 300 pages (estimated based on typical factory workshop manuals for this era and scope).
Type:
Complete Service Repair Workshop Manual
Delivery Method:
Instant Download
Engine Systems:
Engine Removal and Installation, Engine Fuel System, Engine Lubrication and Cooling, Engine Combustion System, Lubrication System, Crankcase/Piston/Cylinder, Crankshaft/Transmission/Balancer, Fuel Injection System (if applicable for later models).
Drivetrain Systems:
Gearbox & Clutch, Transmission System.
Chassis Systems:
Front Wheel and Steering System, Rear Wheel System, Chassis, Frame/Body Panels/Exhaust System, Wheels/Tires/Brakes.
Electrical Systems:
Electrical System, Alternator/Starter Clutch, Battery/Charging System, Ignition System, Electric Starter, Lights/Meters/Switches, Wiring Diagrams.
Body Systems:
Body & Fixtures, Fenders and Exhaust Pipe.
Braking Systems:
Braking System.
Suspension Systems:
Suspension.
General Maintenance:
Periodic checks & Adjustments, General Information, Maintenance.
Diagnostic Procedures:
Troubleshooting.
Repair Procedures:
Step-by-step instructions for all repairs, from simple to complex.
Engine Rebuild:
Includes procedures for full engine disassembly, inspection, component replacement, and reassembly.
Transmission Overhaul:
Detailed steps for gearbox disassembly, gear inspection, clutch adjustment and replacement.
Electrical Troubleshooting:
Comprehensive fault-finding guides for ignition, charging, lighting, and starting systems, supported by wiring diagrams.
Depth:
Factory-level detail, suitable for professional mechanics and experienced enthusiasts.
Diagrams:
Highly detailed exploded pictures and diagrams.
Engine Type:
Twin-cylinder, air-cooled (specific configuration for 850cc engine).
Displacement:
850 cc (approximately)
Horsepower:
Typically in the range of 60-70 bhp for the Commando 850 series, though precise figures vary by specific tune and year.
Torque:
Torque figures would be detailed in the manual, expected to be in the mid-40s lb-ft range.
Carburetion:
Likely equipped with twin Amal carburetors (e.g., Amal Concentric), with specific tuning and jetting details provided.
Fuel Type:
Leaded gasoline (for 1975 models), unleaded compatible variants might exist for later production runs, detailed in the manual.
Engine Layout:
Parallel-twin OHV (Overhead Valve).
Cooling Method:
Air-cooled.
Wheelbase:
Approximately 1400 mm (55 inches) - specific figures will be in the manual.
Length:
Approximately 2100 mm (82.7 inches) - specific figures will be in the manual.
Dry Weight:
Around 190-200 kg (419-441 lbs) - specific figures will be in the manual.
Wet Weight:
Not specified, but will include fluids and fuel.
Crash Test Ratings:
N/A (Motorcycle, pre-dates standardized motorcycle crash testing and ratings).
Braking System:
Front and rear disc brakes (single disc front, possibly drum rear on earlier 1975 models, or twin discs on later variants - manual will clarify).
Suspension Features:
Telescopic front forks, swingarm rear suspension with adjustable shock absorbers.
Lighting:
Headlight, taillight, brake light, turn signals.
Oil Change Interval:
Typically every 3,000 miles or annually, with detailed recommendations in the manual.
Valve Adjustment Interval:
Recommended every 6,000 miles or annually, critical for performance and engine longevity.
Engine Oil Type:
API SG or higher, SAE 20W-50 or SAE 20W-40 motorcycle-specific oil (manual will confirm exact grade and capacity).
Gearbox Oil Type:
Specific gear oil or motorcycle transmission fluid, capacity and grade detailed in manual.
Fork Oil Type:
Specific weight fork oil (e.g., SAE 10W or 15W), capacity per leg specified.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid for hydraulic systems (if applicable).
Isolastic System:
Wear in the rubber isolastic mounts can lead to increased vibration and handling issues; requires periodic inspection and replacement.
Carburetor Tuning:
Amal carburetors can be finicky and require regular synchronization and jetting adjustments for optimal performance.
Oil Leaks:
Common on British motorcycles of this era; gasket and seal integrity is crucial.
Electrical Gremlins:
Vintage wiring can degrade; inspecting and maintaining connections is important.
Heritage:
Norton Motorcycles is a legendary British motorcycle manufacturer with a rich history dating back to the late 19th century, known for innovation and performance.
Command O Lineage:
The Commando was a revolutionary motorcycle when introduced in the late 1960s, known for its Isolastic frame system designed to reduce vibration. The 850cc engine was an evolution of earlier 750cc models.
Mark 3 Updates:
The Mark 3 Commando introduced features like electric start (a significant development), rear disc brakes, and often higher-spec components compared to earlier versions. It aimed to address some of the shortcomings and refine the original design.
Production Period:
The Commando 850 was produced from the early to mid-1970s, with the Mark 3 being one of the later iterations before Norton's financial difficulties in the late 1970s.
Manufacturing Location:
United Kingdom.
