Segment:
50cc Scooter Segment, primarily for urban mobility and younger riders.
Competitors:
Competed with models from Piaggio (Zip, NRG), Yamaha (Jog), Honda (Dio), and Aprilia (SR50) during its production run.
Features:
Sporty styling, agile handling, and reliable performance for its class. Availability of both air and liquid-cooled engines offered model variations.
Manual Advantage:
Provides factory-level diagnostic and repair procedures, crucial for maintaining optimal performance and longevity of the scooter.
Engine:
Complete engine disassembly, reassembly, tuning, and troubleshooting for air and liquid-cooled variants.
Transmission:
Detailed procedures for clutch, gearbox, and final drive maintenance and repair.
Electrical System:
Comprehensive wiring diagrams, component testing, ignition system, lighting, and starter system diagnosis.
Fuel System:
Carburetor specifications, tuning, fuel pump, fuel tank, and fuel line servicing.
Cooling System:
Radiator, coolant flow, thermostat, and fan operation for liquid-cooled models.
Brakes:
Hydraulic system diagnostics, brake pad and disc replacement, caliper servicing, and bleeding procedures.
Suspension:
Front fork overhaul, rear shock absorber inspection and replacement, and linkage system maintenance.
Chassis:
Frame inspection, steering head bearing servicing, and wheel bearing replacement.
Bodywork:
Panel removal and installation, fairing components, and seat servicing.
Maintenance:
Routine maintenance schedules, lubrication points, filter changes, and spark plug replacement.
Troubleshooting:
Diagnostic flowcharts and common problem identification for various systems.
Repair:
Step-by-step disassembly and reassembly instructions for all major components.
Diagnostics:
Guidance on identifying faults through visual inspection, sound analysis, and basic testing.
Technical Specifications:
Torque values, clearances, fluid capacities, and electrical resistance values.
Depth:
Comprehensive coverage from basic owner-level checks to advanced mechanic-level rebuilds and diagnostics.
Type:
Two-stroke, single-cylinder
Cooling:
Air-cooled or Liquid-cooled (depending on specific model variant)
Displacement:
Approximately 49.4 cc
Bore X Stroke:
Refer to manual for specific measurements (typical for 50cc 2-stroke).
Power Output:
Typically around 4-6 HP, dependent on cooling system and tuning (specifics in manual).
Torque Output:
Refer to manual for specific figures, usually in the 4-5 Nm range.
Carburetor Type:
Typically a Dell'Orto PHVA or similar 12-17.5mm carburetor (specific model confirmed in manual).
Fuel Delivery:
Gravity feed from fuel tank, often with a vacuum-operated petcock.
Oil Mixing:
Automatic oil injection system (oil reservoir separate from fuel).
Type:
Automatic CVT (Continuously Variable Transmission) with dry centrifugal clutch.
Optional Gearbox:
Not applicable for this model; standard CVT.
Gear Ratios:
Variable ratios automatically adjusted by the CVT system; manual provides detailed variator and clutch specifications.
Final Drive:
Gear drive via a separate gearbox casing, requiring specific gear oil.
Length:
Refer to manual for exact dimensions, typically around 1800-1900 mm.
Width:
Refer to manual for exact dimensions, typically around 700-750 mm.
Height:
Refer to manual for exact dimensions, typically around 1100-1200 mm.
Dry Weight:
Approximately 90-100 kg, varies with engine type.
Max Load Capacity:
Refer to manual; typically around 150-180 kg including rider.
Fuel Tank Capacity:
Approximately 6-7 liters, including reserve.
Safety Standard:
Manufactured to meet relevant European (e.g., L1 category) and regional safety standards.
Braking System:
Front disc brake, rear drum brake (or dual disc on some variants); manual details specific brake component specifications and maintenance.
Lighting:
Headlight, taillight, brake lights, and turn signals. Wiring diagrams provided in manual are essential for diagnostics.
Frame Construction:
Steel tube frame, designed for stability and rider control.
Tire Specifications:
Front: 120/70-12 or similar; Rear: 130/70-12 or similar (specific sizes detailed in manual).
Instrument Cluster:
Basic analog speedometer, odometer, fuel gauge (if equipped), and indicator lights. Refer to manual for dashboard layout and bulb types.
Driver Assistance Systems:
Not applicable for this model; focus is on mechanical and electrical systems.
Connectivity Features:
No advanced connectivity features; basic electrical system management.
Oil Change Interval:
Refer to manual; typically every 3,000-5,000 km or annually, depending on usage.
Spark Plug Replacement:
Refer to manual; typically every 6,000-10,000 km.
Air Filter Cleaning:
Refer to manual; typically every 2,000-3,000 km, or more frequently in dusty conditions.
Engine Oil:
Refer to manual; typically 2-stroke pre-mix or automatic injection oil meeting API TC or JASO FD standards.
Gearbox Oil:
Refer to manual; typically SAE 75W-90 or SAE 80W-90 GL-3 or GL-4 gear oil. Capacity is small, approximately 0.1-0.2 liters.
Coolant Type:
For liquid-cooled models: Ethylene glycol based coolant, typically a 50/50 mix with distilled water. Refer to manual for specific type and capacity.
Common Wear Items:
Variator rollers and clutch shoes due to CVT operation; carburetor jets clogging from fuel residue; starter motor brushes wearing out.
Electrical Problems:
Corroded electrical connectors, particularly earth points, can cause intermittent issues. CDI unit failure is also possible.
Engine Performance:
Loss of power can be attributed to worn piston rings, exhaust port blockage, or incorrect carburetor jetting.
Manufacturer:
Malaguti, an Italian manufacturer with a long history in motorcycles and scooters, founded in 1930.
Production Period:
The Malaguti Yesterday 50 was produced primarily in the late 1990s and early 2000s.
Variants:
Offered with both air-cooled and liquid-cooled engine options, influencing performance and componentry.
Manufacturing Location:
Likely manufactured in Italy, aligning with Malaguti's primary production facilities.
Industry Awards:
No specific awards are widely documented, but Malaguti scooters were generally well-regarded for their Italian design and sporty feel in their class.
Owner Satisfaction:
Owner satisfaction often tied to the reliability of the specific engine variant and consistent maintenance.
Emission Standards:
Manufactured to meet emissions standards of its era; manual may contain relevant compliance information.
