Sachs MadAss 125 Service Manual - Repair Guide (109 P.)
Sachs MadAss 125 technical guide detailing engine, chassis, and electrical systems. Covers maintenance, troubleshooting, and disassembly procedures. PN FY152FMI.
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Sample pages from the Sachs MadAss 125 Service Manual - Repair Guide (109 P.) manual
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Sachs Models Covered & Key Technical Specifications
Models: Sachs MadAss 125
Sub-models / Variants: 4-Gear Engine
Technical Data:
- Engine type: FY152FMI
- Engine displacement: 119.70 cm³
- Configuration: One cylinder 4-stroke petrol, 2-valve, 1 overhead cam
- Compression ratio: 9.3:1
- Max power: 6.50 kW at 7,500 rpm
- Max torque: 8.5 Nm at 5,400 rpm
- Ignition system: Transistorized ignition system with CDI
- Ignition timing: 15° before TDC at 1,900 rpm; 30° before TDC at 3,500 rpm
- Transmission: 4-speed constant mesh, foot-operated, wet multi-plate clutch
- Electrical: 12V system, 15A main fuse, 12V 6Ah battery
Sachs Manual Features & Content Preview
Technical Scope for the Sachs MadAss 125
- Covers the 125cc Sachs MadAss 125 with the FY152FMI engine variant and 4-speed manual transmission
- Official OEM publication with 107 pages of factory specifications and assembly data
- Contains 12 detailed wiring schematic diagrams, 16 torque reference tables, and 10+ engine assembly views
- File downloads to your account within seconds of checkout
- Indexed PDF search covers every chapter and appendix
- This 107-page service publication is the authoritative reference for internal engine, electrical, and chassis maintenance of the MadAss 125
Component and System Documentation
The 125cc Sachs MadAss 125 service manual provides technical data for the maintenance of the motorcycle's mechanical and electrical systems. Chapters include comprehensive breakdowns of the lubrication system, including oil pump and oil filter screen service, and the fuel system, detailing carburetor settings and throttle valve adjustments. The transmission section details gear ratios, shift drum disassembly, and crankcase bearing replacement procedures, while the engine section covers cylinder head service, valve clearance inspection, and top-end disassembly. The electrical system section documents the fuse ratings, charging coil resistance values, and ignition system testing procedures, supported by a full-page wiring diagram.
Specifications and Technical Data Preview
The manual includes extensive specification tables, providing wear limits and standard reference values for major components. Valve clearance for the intake and exhaust is documented at 0.05 ± 0.02 mm in the cylinder head specification section. Engine oil capacity for the 125cc model is 0.9 liters after draining and 1.0 liters at disassembly. The ignition timing for the MadAss 125 is listed at 30° before TDC at 3,500 rpm in the ignition system specification table. This factory workshop documentation is structured for professional technicians and experienced enthusiasts to perform accurate maintenance based on original equipment manufacturer values. Reference only — always consult a certified technician before performing service on this equipment.
Document Reference: Original OEM manufacturer publication
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