Positioning:
The Cagiva Planet was positioned as a stylish and sporty 125cc motorcycle, popular in the European market for younger riders and commuters. This manual is essential for owners who wish to maintain or repair their vehicle effectively.
Competitors:
Competed with other 125cc sportbikes and naked bikes from manufacturers like Aprilia, Yamaha (DT125R, TZR125), Honda (CR125R), and Suzuki (RG125).
Features:
Known for its aggressive styling, agile handling, and spirited performance for its class. Often featured a two-stroke engine.
Engine:
Detailed breakdown of engine components, assembly, disassembly, tuning, and troubleshooting. Includes cylinder head, piston, crankshaft, camshaft, valve train, cooling system, lubrication system.
Transmission:
Service and repair procedures for the gearbox, clutch operation, and shift mechanisms.
Chassis And Frame:
Frame inspection, alignment, and repair procedures. Includes steering head bearing service and fork maintenance.
Suspension:
Front fork overhaul, rear shock absorber service, and suspension linkage maintenance. Includes specifications for spring rates and damping.
Brakes:
Front and rear brake system maintenance, caliper overhaul, master cylinder service, bleeding procedures, and brake pad replacement. Details on brake fluid specifications.
Electrical System:
Wiring diagrams, component testing, ignition system service, lighting system troubleshooting, battery maintenance, starter motor, and charging system diagnostics.
Fuel System:
Carburetor service and adjustment (including jetting recommendations), fuel tank maintenance, fuel line inspection, and fuel filter replacement.
Exhaust System:
Inspection and replacement of exhaust components, including mufflers and pipes.
Wheels And Tires:
Tire pressure recommendations, wheel bearing service, and spoke tension adjustment for spoked wheels.
Bodywork:
Fairing removal and installation, seat maintenance, and basic body panel repair guidance.
Maintenance:
Routine servicing, oil changes, filter replacements, chain adjustment, lubrication points, and general upkeep.
Troubleshooting:
Diagnostic procedures for common performance issues, electrical faults, and mechanical problems with step-by-step guides.
Repair:
Detailed repair instructions for all major components, including engine rebuilds, transmission overhauls, and suspension repairs.
Disassembly And Assembly:
Comprehensive guides for taking apart and putting back together various motorcycle systems.
Adjustments:
Carburetor synchronization, idle speed adjustment, chain slack adjustment, and brake lever free play.
Engine Rebuild:
Detailed steps for engine disassembly, component inspection, reassembly, and initial break-in procedures. Includes torque specifications for critical fasteners.
Depth:
Comprehensive from basic rider maintenance to full engine rebuilds and advanced electrical diagnostics. Suitable for home mechanics and professional technicians.
Diagnostic Capabilities:
Includes procedures for diagnosing engine running issues, electrical faults, and chassis component problems. Often details the use of multimeters for electrical testing.
Engine Type:
Two-stroke, single-cylinder (typical for 125cc models of this era)
Displacement:
125cc (approximately)
Bore X Stroke:
Typically around 56 mm x 50.6 mm (varies by specific model/variant)
Cooling System:
Liquid-cooled (common)
Horsepower:
Approximately 15-30 HP, depending on restrictions and specific tune (e.g., learner-legal vs. unrestricted).
Torque:
Specific figures vary, but generally tuned for mid-range power delivery.
Fuel Delivery:
Carburetor (e.g., Dell'Orto PHBH 28 or similar)
Ignition:
Electronic Ignition (CDI)
Valve Train:
Reed valve induction (typical for 2-stroke)
Length:
Varies by specific model, typically around 2000 mm
Width:
Varies by specific model, typically around 750 mm
Height:
Varies by specific model, typically around 1100 mm
Dry Weight:
Approximately 120-130 kg
Fuel Tank Capacity:
Approximately 12-14 liters
Front Travel:
Typically around 120-140 mm
Rear Travel:
Typically around 130-150 mm
Safety Ratings:
Not applicable in the same way as cars; focus on rider safety through proper maintenance and handling.
Braking System:
Disc brakes front and rear for effective stopping power. ABS was not common on 125cc models of this era.
Lighting:
Halogen headlight, taillight, and turn signals for visibility.
Frame Construction:
Robust steel frame designed for stability and rider feedback.
Tyre Sizes Front:
Typically 100/80-17 or similar
Tyre Sizes Rear:
Typically 130/70-17 or similar
Oil Change Interval:
Every 3,000-5,000 km or annually, whichever comes first (engine oil for gearbox/clutch).
Spark Plug Replacement:
Every 5,000-10,000 km (depending on plug type and usage).
Air Filter Cleaning Replacement:
Every 5,000 km or as needed based on operating conditions.
Chain Lubrication Adjustment:
Every 1,000 km and after washing or riding in rain.
Engine Oil Type:
2-stroke motorcycle specific oil (pre-mix or separate oil injection system, check manual for exact grade and ratio if pre-mix).
Gearbox Oil Type:
API GL-4 or GL-5 SAE 80W/90 gear oil (verify specific grade in manual).
Coolant Type:
Ethylene glycol-based antifreeze mixture (50/50 with distilled water).
Brake Fluid Type:
DOT 4 or DOT 5.1 (check manual for exact specification).
Common Problems:
Wear on 2-stroke piston rings and cylinder, carburetor jetting issues, electrical connector corrosion, exhaust power valve sticking (if equipped), fork seal leaks, rear shock absorber wear.
Special Tools:
Torque wrench, piston ring compressor, valve lapping tool (if 4-stroke variant exists, though unlikely for Planet), specialized ignition timing tools, fork seal drivers.
