Vehicle Segment:
Lightweight dual-sport/adventure motorcycle.
Target Audience:
Riders seeking an off-road capable yet street-legal motorcycle for commuting and light touring.
Key Competitors:
Models like the Honda NX series, Yamaha XT series, and Kawasaki KLR series of the era.
Engine Type:
Single-cylinder, four-stroke engine.
Suspension Type:
Long-travel suspension for off-road capability.
Design Philosophy:
Balancing off-road prowess with on-road usability and practicality.
Engine Management:
Detailed descriptions of ignition timing, carburetion (if applicable), emission controls, and engine diagnostics.
Drivetrain:
Coverage of clutch, gearbox (manual transmission), final drive, and driveline components, including lubrication and adjustments.
Braking System:
In-depth information on hydraulic systems, disc/drum brake components, adjustment, bleeding procedures, and parking brake.
Electrical And Ignition:
Wiring diagrams, component testing, starter motor, alternator, battery, lighting, and ignition system troubleshooting.
Suspension And Steering:
Front and rear suspension geometry, component replacement (shocks, springs, bushings), steering gear, and alignment specifications.
Climate Control:
Diagnosis and repair of heating and ventilation systems, including blower motor and ductwork.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, fluid level checks, tire rotation, and belt inspections.
Major Repairs:
Engine overhaul procedures, transmission rebuilds, brake caliper replacement, and suspension component renewal.
Diagnostic Troubleshooting:
Step-by-step fault finding for common and uncommon issues based on symptoms.
Component Removal And Installation:
Detailed instructions for removing and reinstalling major and minor components.
Torque Specifications:
Precise torque values for critical fasteners throughout the vehicle.
Depth:
Comprehensive coverage suitable for professional mechanics and advanced DIY enthusiasts, including detailed component diagrams and specifications.
Engine Type:
Single-cylinder, four-stroke
Displacement:
Likely around 125cc to 250cc range, specific details would be in the manual. (Common for this segment in 1990)
Bore X Stroke:
Specifics to be confirmed via manual.
Compression Ratio:
Specifics to be confirmed via manual.
Valve Train:
SOHC (Single Overhead Camshaft) likely.
Horsepower:
Estimated 15-25 HP, depending on exact displacement and tuning.
Torque:
Torque figures to be confirmed via manual.
Fuel Delivery:
Carburetor (likely Keihin or Mikuni).
Fuel Type:
Unleaded gasoline.
Fuel Tank Capacity:
Specifics to be confirmed via manual.
Length:
Specifics to be confirmed via manual.
Width:
Specifics to be confirmed via manual.
Height:
Specifics to be confirmed via manual.
Wheelbase:
Specifics to be confirmed via manual.
Dry Weight:
Estimated 120-150 kg, depending on exact configuration.
Gross Vehicle Weight Rating:
Specifics to be confirmed via manual.
Crash Safety:
N/A for motorcycles of this era (no standardized ratings like cars).
Brakes:
Disc front brake, drum rear brake likely.
Lighting:
Headlight, taillight, brake light, turn signals.
Mirrors:
Handlebar-mounted rear-view mirrors.
Oil Change Interval:
Typically every 3,000-5,000 km or 6-12 months, as per manual recommendations.
Air Filter Cleaning:
Check every 3,000 km, clean/replace as needed.
Spark Plug Replacement:
Intervals typically 6,000-10,000 km, depending on plug type.
Chain Lubrication Adjustment:
Regularly, often every 500-1000 km, and after riding in wet conditions.
Engine Oil Type:
JASO MA certified 10W-40 or 20W-50 motorcycle oil recommended (manual will specify exact grade).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (manual will specify).
Coolant Type:
If liquid-cooled, a specific ethylene glycol-based coolant mixture (manual will specify ratio and type).
Electrical Gremlins:
Older Cagiva models can sometimes experience minor electrical connection issues due to age and vibration. Manual covers diagnostic procedures.
Carburetor Tuning:
Carburetors may require periodic cleaning and adjustment for optimal performance, especially after storage. Manual provides detailed tuning guides.
Suspension Wear:
Seals and bushings in suspension components may wear over time, impacting ride quality. Manual details replacement procedures.
Cagiva Origin:
Italian motorcycle manufacturer founded in 1950.
Cagiva Specialty:
Known for a range of motorcycles from small-displacement commuters to larger street bikes and off-road machines.
N90 Segment:
Part of the trend in the late 80s and early 90s for 'dual-sport' or 'adventure' style motorcycles.
N90 Design Influence:
Likely influenced by Japanese dual-sport designs, offering a practical and versatile platform.
Production Years:
Specific production years for the N90 model would need verification, but likely a few years around 1990.
Manufacturing Location:
Italy (Cagiva's primary manufacturing base).
