Segment:
Sport Touring Motorcycle
Target Audience:
Enthusiasts and owners seeking to maintain or restore their 1991 Cagiva 900 GT
Competitors Early 90S:
Ducati Monster (later), BMW K-Series, Moto Guzzi California, other large-displacement European and Japanese sportbikes
Engine Configuration:
Iconic Cagiva L-Twin engine, known for its character and torque
Design:
Sporty yet comfortable ergonomics, suitable for touring and spirited riding
Fueling:
Fuel Injection (IE) system, indicating a move towards more modern and efficient engine management for its time
Manual Type:
Service Repair Workshop Manual
Format:
Digital Download (PDF)
Page Count:
Estimated 200-300 pages (typical for this era and type of manual)
Digital Compatibility:
All Operating Systems (MAC, Windows XP, Vista, 7, 8, 10, 11)
Engine:
Complete overhaul, top-end, bottom-end, valve timing, cooling system, lubrication, fuel injection system (IE - Injection Elektronik)
Transmission:
Gearbox disassembly, assembly, maintenance, clutch operation and servicing
Chassis:
Frame inspection, steering head bearings, swingarm and linkage, rear shock absorber adjustment/replacement
Brakes:
Front and rear brake system maintenance, caliper overhaul, master cylinder service, fluid replacement, bleeding procedures
Electrical:
Wiring diagrams, ignition system, lighting, starting system, charging system, battery maintenance, diagnostic codes (if applicable for IE)
Fuel System:
Fuel tank, fuel pump, fuel lines, fuel injectors, throttle body, air filter system, ECU diagnostics for IE
Suspension:
Front fork maintenance (oil levels, seals, springs), rear suspension linkage and shock absorber
Exhaust:
Exhaust system inspection and maintenance
Bodywork:
Fairings, seat, fuel tank removal and installation, minor body panel repairs
Maintenance:
Scheduled maintenance (oil changes, filter replacements, chain adjustment, brake checks), lubrication points
Troubleshooting:
Diagnostic flowcharts for common starting, running, and electrical issues
Repair:
Step-by-step instructions for component disassembly, repair, and reassembly
Technical Data:
Torque specifications for all fasteners, clearances, valve lash settings, fluid capacities
Special Tools:
Identification and usage of specialized tools required for specific procedures
Depth:
Comprehensive, covering routine maintenance to major engine and component overhauls
Diagrams:
Detailed exploded views and schematic diagrams for all major systems
Photos:
Step-by-step photo illustrations for critical procedures
Engine Type:
Four-stroke, air-cooled, L-Twin (90-degree V-twin)
Bore X Stroke:
92 mm x 68 mm (typical for this engine family)
Valvetrain:
Desmodromic, 2 valves per cylinder (pushrod actuated, or overhead cam depending on specific variant)
Compression Ratio:
Approximately 9.2:1 (typical)
Horsepower Est:
Approx. 60-70 HP @ 7000 RPM (varies by specific tuning and market)
Torque Est:
Approx. 70-75 Nm @ 5500 RPM (varies)
Fuel Delivery:
Electronic Fuel Injection (IE), likely Weber-Marelli or similar system for the era
Fuel Type:
Unleaded Gasoline (Octane rating as per manual recommendation, likely 95 RON or higher)
Ignition System:
Electronic ignition with dual spark plugs per cylinder for improved combustion
Cooling Method:
Air-cooled
Safety Features:
Integral braking system (early versions), disc brakes front and rear
Braking System:
Dual front discs with 2-piston calipers, single rear disc with 2-piston caliper
Frame Construction:
Steel trellis frame, providing good rigidity and handling characteristics
Oil Change Interval:
Every 3,000-5,000 km (1,800-3,000 miles) or annually, whichever comes first (refer to manual for exact spec)
Valve Clearance Check:
Every 6,000-10,000 km (3,700-6,200 miles) (typical for desmodromic valves)
Spark Plug Replacement:
Every 10,000-15,000 km (6,200-9,300 miles)
Engine Oil:
API SG or higher, SAE 10W-40 or 20W-50 motorcycle specific oil (confirm viscosity with ambient temperature, refer to manual)
Brake Fluid:
DOT 4 (check manual for confirmation, especially for ABS if equipped)
Fork Oil:
Typically a 10W or 15W fork oil (capacity and viscosity to be confirmed in manual)
Coolant:
N/A (Air-cooled engine)
Gearbox Oil:
API GL-4 or GL-5, SAE 75W-90 or 80W-90 gear oil (capacity and specific grade in manual)
Electrical Gremlins:
Age-related degradation of wiring harness insulation and connectors can lead to intermittent electrical issues. Corrosion is also a common factor.
Carburetor Vs Injection:
While this is an IE model, earlier versions used carburetors. Fuel injection systems (like Weber-Marelli) can be sensitive to fuel quality and require specific diagnostic tools for advanced issues.
Desmodromic Maintenance:
Desmodromic valve systems, while effective, require precise adjustment and maintenance, especially valve clearance checks, to maintain performance and prevent wear.
Fuel Tank Corrosion:
Older fuel tanks, especially those made of steel, can be prone to rust if not properly maintained or if fuel sits for extended periods.
Italian Motorcycle Manufacturer:
Cagiva is an Italian motorcycle manufacturer with a history dating back to 1978, known for its association with Ducati engines and a range of street bikes and off-road machines.
Engine Source:
The 904cc L-twin engine is derived from Ducati's Pantah engine design, a cornerstone of Cagiva's larger displacement offerings in this era.
Production Period:
The Cagiva 900 GT and its variants were produced in the late 1980s and early 1990s.
