Market Position:
The Derbi Variant 50 was a popular lightweight scooter in its era, known for its practicality and ease of use, often positioned as an accessible urban mobility solution.
Competitive Analysis:
Competed with other 50cc scooters from manufacturers like Vespa, Piaggio, Peugeot, and Tomos, offering a balance of performance and affordability.
Key Features:
Compact size, automatic transmission, lightweight construction, simple operation, and iconic styling for its time.
Coverage Summary:
Identifies specific parts for the Derbi Variant 50
Estimated Pages:
Varies significantly based on specific edition and print run; typically 100-300 pages for a comprehensive parts catalog of this nature.
Manual Type:
Parts Catalog
Language:
Likely English, potentially multilingual depending on market of origin.
Format:
Physical printed document. Digital formats (PDF) may also be available from third parties.
Engine:
Engine components (cylinder, piston, crankshaft, carburetor, exhaust, ignition system components).
Transmission:
Automatic transmission components (if applicable to the Variant 50 variant), drive system components.
Chassis:
Frame, suspension (front fork, rear shock absorber), steering components, wheels, tires.
Brakes:
Brake system components (discs, calipers, master cylinder, brake shoes, levers).
Electrical:
Electrical system components (lighting, wiring harness, battery, ignition coil, stator, voltage regulator).
Bodywork:
Body panels, fairings, seat, fuel tank, fenders, handlebars, controls.
Consumables:
Gaskets, seals, O-rings, filters (air filter, fuel filter).
Part Identification:
Detailed diagrams with corresponding part numbers for accurate identification.
Assembly Disassembly:
Implied through part breakdown, aiding in understanding component relationships for assembly and disassembly.
Technical Depth:
Highly detailed, focusing on the identification and interrelation of individual components for replacement and ordering.
File Format:
N/A (physical print). If digital, typically PDF.
Print Quality:
Typically good quality black and white line drawings and diagrams. Color may be present in some editions for diagrams or labels.
Binding Type:
Likely spiral-bound or saddle-stitched for lay-flat use in a workshop environment.
Paper Type:
Durable paper stock, often on the heavier side to withstand workshop conditions.
Engine Type:
Two-stroke, air-cooled single-cylinder
Displacement:
Approximately 49.4 cc (depending on specific variant and market).
Bore X Stroke:
Typical for this era: ~39.0 mm x 41.4 mm (exact figures may vary).
Power Output:
Generally in the range of 3-5 HP, depending on tuning and emissions regulations of the era.
Torque:
Low to moderate torque, typical for a 50cc two-stroke.
Carburetor Type:
Likely a Dell'Orto or similar 14-16mm carburetor.
Fuel Type:
Unleaded gasoline mixed with two-stroke engine oil (typically 1:25 or 1:50 ratio).
Lubrication System:
Premix or automatic oil injection system.
Length:
Approximately 1700-1800 mm (variable by specific model year/variant)
Width:
Approximately 700-750 mm (including handlebars)
Height:
Approximately 1050-1100 mm (to top of handlebars)
Dry Weight:
Typically around 70-80 kg
Gross Vehicle Weight Rating:
Not typically specified for this class of vehicle in the same way as larger motorcycles.
Safety Ratings:
No formal crash test ratings like modern automobiles; safety is primarily related to vehicle stability and braking effectiveness.
Active Safety Features:
Effective braking system for its class, stable chassis design.
Passive Safety Features:
Frame structure, handlebar protection, basic lighting for visibility.
Oil Change Interval:
For transmission oil: Varies, typically every 5,000-10,000 km or as per specific service manual. For 2-stroke oil: dependent on premix ratio or automatic injection system function.
Spark Plug Replacement:
Typically every 3,000-6,000 km, depending on spark plug type and usage.
Air Filter Cleaning Replacement:
Regular cleaning/replacement, e.g., every 2,000-4,000 km, or more frequently in dusty conditions.
Brake Pad Inspection Replacement:
Visual inspection at regular intervals (e.g., every 2,000 km), replacement as needed based on wear.
Transmission Oil Type:
Typically SAE 80W/90 or SAE 10W/40 API GL-3 or GL-4 gear oil. Consult specific manual for exact specification.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Two Stroke Oil Specification:
High-quality 2-stroke mineral or semi-synthetic oil, suitable for air-cooled engines. Check for JASO FB/FC or ISO-L-EGD specifications.
Known Issues:
Carburetor tuning can be sensitive, CDI unit failures, stator issues, wear on CVT components (belts, rollers), exhaust port carbon buildup, electrical connector corrosion.
Brand Heritage:
Derbi is a Spanish manufacturer with a long history in motorcycle production, particularly known for its small-displacement models and racing heritage.
Model Evolution:
The Derbi Variant was introduced in the late 1970s and underwent several updates and variations over its production run, evolving in styling and minor mechanical aspects.
Production Period:
Production began in the late 1970s and continued through the 1980s and into the early 1990s, with variations in different markets.
Manufacturing Location:
Spain
