Model Variants:
Runner 50 FX / DD, Runner 125 FX, Runner 180 FXR
Years Covered:
1997, 1998, 1999, 2000, 2001
Target Audience:
Urban commuters and young riders seeking sporty scooter performance
Manual Audience:
Technicians, mechanics, and DIY owners
Main Competitors:
Piaggio NRG, Yamaha Aerox, Peugeot Speedfight
Key Advantage:
Large-diameter wheels (12-inch) giving motorcycle-like stability, unusual among small scooters of the era
Design:
Aggressive sport styling with chromed exhaust and sport seating position
Platform:
Steel frame with large 12-inch wheels
Engines:
Air-cooled two-stroke single-cylinder engines (50, 125, and 180 cc Leader family)
Braking:
Front disc brake with rear drum, optional dual front discs on 125/180
Areas Covered:
Engine, transmission, fuel system, electrical, brakes, suspension, body, maintenance
Depth:
Complete factory-level service and repair procedures with specifications
Manual Type:
Service Repair Workshop Manual
Page Count:
N/A - not specified, complete factory content included
File Format:
Searchable PDF (zoomable, printable, bookmarked chapters)
Delivery Method:
Instant digital download - no shipping, no waiting
Compatibility:
Windows PC, Mac, tablets, and smartphones
Access:
Download again anytime after purchase
Engine:
Complete two-stroke engine - disassembly, inspection, overhaul, and rebuild
Fuel System:
Carburetor service, fuel tank, and oil injection system
Ignition System:
CDI ignition components, testing, and timing
Transmission:
CVT drive belt, variator, clutch, and gear reduction unit service
Electrical System:
Wiring diagrams, battery, charging, starter, and lighting circuits
Cooling System:
Air-cooling shrouds and cooling-related components
Lubrication:
Two-stroke oil injection system and premix procedures
Brake System:
Disc and drum brake inspection, pad and shoe replacement, hydraulic service
Suspension:
Front fork and rear shock absorber service
Steering:
Steering column, bearings, and handlebar components
Wheels & Tires:
Wheel removal, bearing service, and tire specifications
Body & Frame:
Body panel removal, frame inspection, and fastener torque values
Troubleshooting:
Symptom-based diagnostics with flowcharts and diagnostic trees
Maintenance Schedules:
Factory service intervals and maintenance procedures
Specifications:
All factory specifications, tolerances, and wear limits
Torque Values:
Tightening torque specifications for all fasteners
Special Tools:
Special service tool numbers with illustrations
Electrical Testing:
Multimeter testing procedures and component function verification
Wiring Diagrams:
Detailed wiring diagrams and electrical schematics
Exploded Views:
Exploded-view parts diagrams with OEM part numbers
Procedural Diagrams:
Step-by-step illustrations with tool usage
Component Guides:
Component identification and location guides
Model Coverage:
All Runner models, engine variants, and trim levels 1997-2001
Safety Warnings:
General information and safety warnings included
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Primary Engine:
Two-stroke single-cylinder air-cooled
Engine Options:
50 cc, 125 cc, and 180 cc Leader-family engines
Induction:
Reed valve intake with carburetor
Lubrication:
Automatic oil injection (separate oil tank)
125 cc Output:
Approximately 14-15 hp depending on market and model year
180 cc Output:
Approximately 19-21 hp depending on market and model year
50 cc Output:
Restricted per licensing regulations of each market
Detailed Specs:
Refer to manual for detailed factory specifications
Fuel Delivery:
Carburetor (Dellorto/Keihin type per model)
Fuel Type:
Unleaded petrol with automatic oil injection
Starting:
Electric start with kick starter backup on most variants
Standard Transmission:
Continuously Variable Transmission (CVT) with automatic centrifugal clutch
Optional Transmission:
N/A - CVT automatic was the only transmission offered
Final Drive:
Gear reduction unit in rear hub
Drive Belt:
V-belt drive with variable-width pulleys (variator and torque driver)
Service:
CVT belt inspection and replacement, roller weight service covered in manual
Clutch:
Automatic centrifugal dry clutch, adjustable contra-springs
Wheelbase:
Approximately 1,370 mm for the Runner 125/180
Wheels:
12-inch front and rear alloy wheels
Overall Length:
Approximately 1,860 mm
Curb Weight:
Approximately 115-125 kg depending on engine variant
Fuel Tank Capacity:
Approximately 9 liters
Full Specifications:
Exact per-model dimensions and weights are given in the manual specifications chapter
Ratings:
N/A - scooters of this era were not crash tested by Euro NCAP
Front Brakes:
Hydraulic disc brake; dual front discs on 125/180 versions
Lighting:
Halogen headlamp with horn and indicator circuits
Frame:
Tubular steel frame
Steering Lock:
Steering lock integrated with ignition switch
Mirrors:
Rear-view mirrors
Audio System:
N/A - not fitted on this scooter
Instrumentation:
Analog speedometer with fuel gauge and warning lights
Assistance Systems:
N/A - no electronic rider aids on this era of scooter
Electric Start:
Electric starter motor with kick starter backup
Battery:
12-volt battery electrical system
Ignition:
CDI electronic ignition
Service Schedule:
Factory maintenance intervals included in the manual
Typical Interval:
Routine service approximately every 3,000-6,000 km per factory schedule
Two-Stroke Oil:
Check and top up oil injection tank at every fuel fill; oil pump inspection at scheduled service
Engine Oil:
Two-stroke oil for the automatic oil injection system
Gear Oil:
Gear reduction unit oil, change at scheduled intervals
Brake Fluid:
DOT 4 brake fluid for hydraulic disc circuits
Known Issues / Common Wear
CVT Belt:
Drive belt wear is a primary wear item - inspect regularly
Roller Weights:
Variator roller weights flatten with mileage, affecting acceleration
Clutch Shoes:
Centrifugal clutch shoe wear at high mileage
Electrical:
Check connector corrosion on lighting and CDI circuits
Manufacturer:
Gilera, an Italian marque founded in Arcore in 1909 by Giuseppe Gilera
Ownership:
Part of the Piaggio Group during the Runner's production
Racing Heritage:
Historic Grand Prix motorcycle racing success in the 1950s with multiple world titles
Introduction:
Runner launched in 1997 with the 50 cc model, followed by the 125 and 180
Design Significance:
One of the first sport scooters with large 12-inch wheels
Later Evolution:
Runner continued after 2001 with four-stroke four-valve purejet and later models
Production Location:
Italy (Piaggio Group production)
Production Years:
1997-2001 covered by this manual