Class:
Compact, utilitarian motorcycle, likely popular for commuting and general use
Competitors:
Similar era models from Honda (e.g., CB series), Yamaha (e.g., YB series), Suzuki (e.g., GS series), Kawasaki (e.g., KZ series)
Design Philosophy:
Focus on reliability, ease of maintenance, and practical performance
Engine:
Engine overhaul, tuning, lubrication, cooling, fuel, ignition systems, emission controls
Transmission:
Clutch, gearbox, final drive, maintenance, repair procedures
Chassis:
Frame, suspension (front and rear), steering system, wheel bearings
Brakes:
Hydraulic system, master cylinder, wheel cylinders/calipers, brake pads/shoes, hydraulic lines, bleeding procedures
Electrical:
Wiring diagrams, battery, charging system, starting system, lighting, instrumentation, ignition system diagnostics
Bodywork:
Body panel removal/installation, trim, seat removal, basic body repair considerations
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, fluid level checks, chain lubrication and adjustment
Troubleshooting:
Diagnostic charts for common performance issues, starting problems, electrical faults
Repair Procedures:
Step-by-step instructions for component removal, disassembly, reassembly, and installation
Adjustments:
Carburetor synchronization and tuning, valve clearance adjustments, clutch and brake lever adjustments
Depth:
Comprehensive coverage for DIY mechanics and professional technicians, including detailed diagrams and specifications
Format Details:
Likely a professionally printed book, bound for durability in a workshop environment
Quality:
Expected to be high quality with clear diagrams and text, suitable for frequent reference
Binding:
Professional binding (e.g., perfect bound or saddle-stitched) for workshop durability
Paper:
Durable, possibly coated paper to resist grease and shop dirt
Engine Type:
Likely a 4-stroke, air-cooled, single-cylinder engine (common for this class)
Displacement:
Estimated around 80-125cc, though specific N90 variant might vary. The 'N' designation often referred to a specific engine family or model series for Cagiva.
Bore X Stroke:
Requires specific model data for precise figures, but typical for small displacement singles.
Horsepower:
Estimated 8-12 HP, depending on exact displacement and tuning.
Torque:
Low to mid-range focused for practical usability.
Carburetion:
Single carburetor, likely from Mikuni or Dell'Orto, requiring manual adjustment and cleaning.
Fuel Type:
Unleaded gasoline
System:
CDI (Capacitor Discharge Ignition) or electronic ignition system.
Type:
5-speed manual transmission
Clutch:
Wet multi-plate clutch, operated by cable
Gear Ratios:
Specific ratios detailed in the manual, optimized for a balance of acceleration and top speed.
Transmission Oil:
SAE 10W-40 or 20W-50 motorcycle-specific gearbox oil, capacity specified in manual.
Wheelbase:
Requires specific model data, but typical for its class.
Length:
Requires specific model data.
Width:
Requires specific model data.
Height:
Requires specific model data.
Dry Weight:
Estimated 90-110 kg, depending on configuration.
Fuel Capacity:
Estimated 7-10 liters.
Safety Features General:
Focus on basic rider safety for its era: reliable braking, adequate lighting.
Braking System:
Front disc brake and rear drum brake or dual front/rear drum brakes depending on exact variant.
Tires:
Tubed spoke wheels with front and rear tire sizes specified in manual.
Lighting:
Headlight, taillight, turn signals, brake light.
Oil Change Interval:
Typically every 3,000-5,000 km or annually, as per manual recommendations.
Spark Plug Replacement:
Intervals around 6,000-10,000 km, depending on plug type.
Valve Adjustment:
Typically every 10,000-15,000 km.
Chain Lubrication Adjustment:
Recommended every 500-1,000 km or after washing/wet riding.
Engine Oil:
API SG or higher specification, viscosity SAE 10W-40 or 20W-50, capacity specified in manual.
Brake Fluid:
DOT 3 or DOT 4, depending on hydraulic system requirements, as per manual.
Common Wear Items:
Tires, brake pads/shoes, chain and sprockets, spark plugs, carburetor jets, electrical connectors.
Potential Problems:
Carburetor tuning instability, ignition system component failure (e.g., CDI unit), worn clutch plates, minor electrical gremlins due to age.
Manufacturer:
Cagiva is an Italian motorcycle manufacturer founded in 1978.
Reputation:
Known for producing a range of motorcycles, from small capacity commuters to larger performance bikes, often with distinctive Italian styling.
N90 Context:
The N90 likely represented Cagiva's offering in the competitive 50cc-125cc segment of the European market during the late 1980s and early 1990s.
Production Era:
Circa 1980s to early 1990s.
