2006-2008 Vespa LX 50 4valvole Factory Service Manual (P/N 665230)
Vespa Models Covered & Key Technical Specifications
Models: Vespa LX 50 4valvole
Sub-models / Variants: 50cc 4-stroke
Model Years: 2006–2008
Serial Numbers: ZAPC383000001001, C383M (Engine prefix)
Technical Data:
- Engine type: Single-cylinder, 4-stroke, 4-valve, air-cooled
- Engine displacement: 49.9 cc
- Max Power: 3.2 kW at 8250 rpm
- Max Torque: 3.8 Nm at 7750 rpm
- Bore x Stroke: 39 mm x 41.8 mm
- Compression ratio: 11.5–12.5:1
- Transmission type: Automatic variable pulley (CVT) with torque server
- Fuel system: Keihin NCV ø 20 vacuum carburetor with SIS electronic control
- Engine oil capacity: ~ 850 cm³
- Drive system: V-belt automatic clutch
- Front suspension: Single-arm with hydraulic shock absorber
- Rear suspension: Single hydraulic shock absorber with helical coaxial spring
Vespa Manual Features & Content Preview
- Official Piaggio publication P/N 665230 (EN), first edition 2008
- Covers 50cc 4-stroke engine diagnostics, chassis inspection, and 51 indexed topics across the powertrain and electrical systems
- Features technical specification tables, complete wiring diagrams, and exploded-view component identification images
- Serves as the primary OEM reference for the 4-valve engine variant of the LX 50 line, spanning 218 pages
Component and Systems Documentation
Professional wrenchers and dedicated DIY mechanics need accurate data to keep these scooters on the road. This documentation provides exact, structured technical specifications for the disassembly and inspection of the single-cylinder 4-stroke engine. You get precise parameters for valve timing, piston-to-cylinder coupling clearances, and crankshaft alignment. It also breaks down the automatic transmission system. Expect detailed teardown data for the driven pulley, clutch assembly, and drive belt. Routine maintenance intervals are mapped out clearly, including oil replacement schedules, air filter cleaning procedures, and spark plug gapping. Because handling internal engine components carries inherent risks to both the machine and the mechanic, strict adherence to these factory-specified safety protocols and torque values is crucial during any major repair work.
Specification Highlights
Precision is everything when rebuilding a Piaggio powertrain. This reference lays out critical assembly measurements to ensure long-term reliability. For example, intake valve clearance is firmly documented at 0.10 mm. You will find exact tolerances, such as the crankshaft bearing transmission side diameter, specified at 20 -0.012 -0.025 mm. Fluid capacities are explicit, listing the engine oil requirement at exactly 850 cm³. Fuel delivery isn't left to guesswork, either. The dedicated carburetor section delivers hard data for tuning the Keihin NCV 20, breaking down needle valve settings and specific jet sizes to optimize air-fuel mixtures. Whether you are chasing an electrical gremlin or overhauling the braking system, these factory specifications take the guesswork out of complex shop tasks.
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