Segment:
Urban Mobility Scooter / Maxi-Scooter niche, known for its unique safety cage and car-like features.
Competitors Typical:
Yamaha Majesty, Suzuki Burgman, Honda Foresight, Aprilia Leonardo (at the time of production).
Unique Selling Points:
Integrated safety cage with crumple zones, optional airbags, windshield wiper, seatbelt, offering a higher level of passive safety than traditional scooters.
Intended Users:
Commuters seeking enhanced safety and weather protection in an urban environment, those transitioning from cars to two-wheeled transport.
General Coverage:
Comprehensive workshop and repair information
Estimated Pages:
Likely 200-400+ pages (typical for workshop manuals of this era, specific count not provided in product info)
Type:
Service Manual / Repair Manual
Language:
English (assumed, standard for BMW service manuals)
Engine Mechanical:
Detailed disassembly, assembly, inspection, and repair of the 125cc engine, including cylinder, piston, crankshaft, connecting rod, valves, camshaft.
Engine Management:
Fuel injection system (EFI), ignition system, sensors, electronic control unit (ECU) diagnostics and troubleshooting.
Transmission:
Automatic transmission (CVT) system, including belt, variator, clutch, and case assembly and maintenance.
Chassis And Frame:
Frame construction, suspension (front telescopic fork, rear monoshock), steering system, wheel bearings, and alignment.
Brakes:
Front and rear braking systems (likely disc brakes), including hydraulic components, brake pads, discs, and bleeding procedures.
Electrical System:
Wiring diagrams, battery, charging system (alternator/generator), starter motor, lighting, indicators, horn, and instrument cluster.
Bodywork And Trim:
Body panels, seat, fairings, C1 safety cell structure, storage compartment, and accessory mounting.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, drive belt inspection/replacement, brake fluid replacement, coolant checks, tire pressure monitoring.
Troubleshooting:
Diagnostic flowcharts and common problem identification for engine, electrical, and mechanical issues.
Repair And Rebuild:
Step-by-step instructions for component disassembly, cleaning, inspection, repair, and reassembly of major systems.
Diagnostics:
Guidance on using diagnostic tools (if applicable), interpreting error codes, and diagnosing electrical faults.
Specifications And Tolerances:
Torque values for fasteners, clearances, wear limits, and critical measurements.
Depth:
Comprehensive, covering everything from basic service to in-depth mechanical and electrical repair, suitable for professional technicians and experienced DIYers.
Engine Type:
Single-cylinder, four-stroke
Displacement:
125 cc (approx. 124.6 cc)
Bore X Stroke:
Typically around 52 mm x 58 mm (specific to engine variant, verify with manual)
Cooling System:
Liquid-cooled
Valve Train:
SOHC (Single Overhead Camshaft)
Horsepower:
Approximately 15 HP (11 kW) at 8,250 rpm (typical for this engine size and era, verify with manual)
Torque:
Approximately 12 Nm (9 lb-ft) at 7,000 rpm (typical, verify with manual)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded Gasoline (95 RON recommended)
Oil Type:
SAE 10W-40 Synthetic Scooter Oil (API SG or higher, JASO MA certified)
Oil Capacity:
Approx. 1.0 - 1.2 liters (verify with manual for specific fill levels)
Length:
Approx. 2,000 - 2,100 mm
Width:
Approx. 730 - 800 mm (including safety cell)
Height:
Approx. 1,300 - 1,400 mm (to top of windshield/cage)
Dry Weight:
Approx. 170 - 185 kg
Gross Vehicle Weight Rating:
Approx. 345 - 370 kg
Storage Capacity:
Under-seat storage compartment, potentially small glovebox.
Crash Protection Design:
Integrated safety cell with roll-over protection, crumple zones, and a robust frame structure.
Braking System Type:
Disc brakes front and rear, hydraulic actuation.
Lighting:
Halogen headlight, LED taillight, turn signals.
Occupant Restraint:
Standard three-point seatbelt. Optional airbag system available on some models.
Windshield:
Full-height windshield with optional wipers for improved visibility.
Features:
Basic instrumentation: speedometer, odometer, fuel gauge, coolant temperature warning light. No advanced infotainment systems.
Safety Enhancements:
ABS (Anti-lock Braking System) was an optional feature on some models.
Connectivity Options:
N/A (no Bluetooth, USB, or smartphone integration)
Oil Change Interval:
Every 5,000 km or annually, whichever comes first. (Verify specific interval in manual).
Air Filter Replacement:
Inspect every 5,000 km, replace as needed or every 10,000 km. (Verify in manual).
Spark Plug Replacement:
Check every 5,000 km, replace around 10,000-15,000 km depending on wear. (Verify in manual).
Drive Belt Inspection:
Inspect every 10,000 km, replace as recommended by manual (often 20,000-30,000 km).
Brake Fluid Replacement:
Every 2 years, regardless of mileage. (Verify in manual).
Engine Oil Spec:
SAE 10W-40 Synthetic (API SG/SH/SJ, JASO MA)
Coolant Spec:
BMW approved ethylene glycol based coolant, mixed 50/50 with distilled water.
Brake Fluid Spec:
DOT 4 Hydraulic Brake Fluid
Common Wear Items:
Drive belt, variator rollers, brake pads, front fork seals, rear shock absorber.
Electrical Gremlins:
Some reports of intermittent electrical issues, particularly with aging wiring harnesses or connectors.
Fuel Pump Reliability:
Occasional fuel pump failures have been noted in some units.
Windshield Wiper Motor:
The wiper motor can sometimes fail, requiring replacement.
Bmw Motorcycle Division:
BMW Motorrad has a long history of innovation in motorcycle design and engineering, known for quality and performance.
C Series Scooters:
The C1 line represented BMW's foray into the urban mobility segment, aiming to provide a car-like experience with the agility of a scooter.
Manufacturing Location:
Germany (primarily)
Production Years Overview:
Launched in 2000, with production continuing until 2003. The C1 was a niche product and its successor, the C600 Sport/C650GT, arrived much later.
