Piston Piaggio Original – 125cc IGET LC 4V – Vespa GTS, GTS Super, Piaggio Medley, Aprilia SR GT – Category A, B, C, D
Original Piaggio pistons for liquid-cooled 125cc IGET four-stroke engines with four valves. These pistons are intended as replacement parts for professional engine repairs and are available in four size categories. This allows the appropriate version to be selected for the respective cylinder when replacing a piston.
The pistons are available in categories A, B, C and D, also designated 1, 2, 3 and 4. Selection is based on the size classification of the existing cylinder. Correct matching is essential to maintain the specified piston-to-cylinder clearance and ensure reliable engine operation.
What does IGET mean in Piaggio engines?
IGET stands for Italian Green Experience Technology. Piaggio uses this designation for a modern generation of four-stroke engines developed with particular emphasis on efficiency, combustion quality, reduced emissions and smooth engine operation.
IGET engines were developed for different vehicle types and displacement classes. Depending on the version, different cooling systems and valve configurations are used. Consequently, not all IGET engines have the same mechanical design.
The 125cc version described here belongs to the liquid-cooled engine family with four valves. It features a single-cylinder four-stroke engine with an overhead camshaft and electronic fuel injection.
The engine has a cylinder bore of 52mm and a piston stroke of 58.7mm. This results in an actual displacement of approximately 124.7cc.
During the development of the IGET engine generation, Piaggio focused on aspects including combustion, mechanical friction losses and noise levels. The coordinated design of the individual engine components is intended to provide efficient and consistent operation.
This coordination also includes the interaction between the piston, cylinder, piston rings and combustion chamber. Correct component dimensions are an important requirement for proper engine operation.
Four piston categories for different size classes
Piaggio offers these pistons in four different size categories. The categories account for minor manufacturing-related dimensional variations within the standard cylinder and piston dimensions.
The size classes are identified by the letters A, B, C and D or the numbers 1, 2, 3 and 4.
The following versions and original part numbers are assigned:
- Category A / 1 – Piaggio original part number 1A0155460A, additional part numbers 1A0203320A and 1A0067710A
- Category B / 2 – Piaggio original part number 1A0155460B, additional part numbers 1A0203320B and 1A0067710B
- Category C / 3 – Piaggio original part number 1A0155460C, additional part numbers 1A0203320C and 1A0067710C
- Category D / 4 – Piaggio original part number 1A0155460D, additional part numbers 1A0203320D and 1A0067710D
The different size categories should not be confused with conventional repair oversizes. They are used to match a piston to the standard dimensional tolerances of the cylinder and are not intended for use in cylinders that have been rebored to a significantly larger diameter.
Before ordering, the required piston category must be determined using the cylinder identification markings and, where necessary, by accurately measuring the cylinder bore.
The vehicle model designation alone does not provide a reliable indication of the required category. Different size classes may have been used even within identical engine versions.
Piston design and construction features
The piston features a specially shaped piston crown matched to the combustion chamber geometry of the liquid-cooled 125cc IGET engine. The contour of the piston crown forms part of the engine's designed compression characteristics.
The fitted piston rings perform several functions. They seal the combustion chamber against the crankcase, assist heat transfer to the cylinder wall and regulate the lubricating oil film.
Around the piston pin bosses, the piston features a reinforced internal structure with stiffening ribs. These areas absorb and transmit the mechanical loads generated during engine operation.
The product images also show the machined piston pin bores and a marking on the piston crown. The installation direction specified by the manufacturer must be observed during assembly.
Technical specifications
- Manufacturer: Piaggio
- Product: original piston for four-stroke engines
- Engine family: IGET – Italian Green Experience Technology
- Engine version: 125cc LC 4V
- Actual engine displacement: approx. 124.7cc
- Engine configuration: single-cylinder four-stroke engine
- Number of valves: four
- Valve train: overhead camshaft
- Cooling: liquid cooling (LC)
- Fuel system: electronic fuel injection
- Nominal engine bore: 52mm
- Engine stroke: 58.7mm
- Available size categories: A, B, C, D or 1, 2, 3, 4
- Piaggio original part numbers: 1A0155460A, 1A0155460B, 1A0155460C, 1A0155460D
- Additional associated part numbers: 1A0203320A, 1A0203320B, 1A0203320C, 1A0203320D
- Additional associated part numbers: 1A0067710A, 1A0067710B, 1A0067710C, 1A0067710D
- Piston crown: specially shaped contour for the intended combustion chamber
- Piston construction: reinforced piston pin bosses
- Product images: piston with fitted piston rings
- Application: replacement in cases of wear, damage or engine overhaul
Suitable for Vespa
- Vespa GTS 125 (2016–)
- Vespa GTS Super 125 (2016–)
Suitable for Piaggio models
- Piaggio Medley 125 (2016–2024)
- Piaggio Mymoover Delivery 125 (2021–2022)
Other compatible models
- Aprilia SR GT 125 (2021–2024)
The listed vehicle compatibility applies to the corresponding models equipped with the liquid-cooled 125cc IGET four-valve engine. As different engine versions may be used within individual model ranges, the engine version, original part number and required piston category must be checked before ordering.
Important information on selection and installation
When replacing a piston, the condition of the cylinder should first be checked. Wear, scoring or other damage to the cylinder bore can affect the operation of a new piston.
The manufacturer's specifications and the actual cylinder dimensions are decisive when selecting the correct size category. In particular, the specified piston-to-cylinder clearance must be maintained.
During installation, attention must be paid to the correct piston orientation, piston ring end gap, piston ring arrangement and proper securing of the piston pin.
It is also advisable to inspect the piston pin, connecting rod bearing and other components of the cylinder-piston assembly. Damaged or excessively worn components must be replaced professionally.
Installing a new piston requires a cylinder in technically sound condition. A worn cylinder cannot be repaired simply by fitting a new piston.
Original Piaggio replacement part for professional engine repairs
Original Piaggio pistons enable targeted repairs of liquid-cooled 125cc IGET engines while taking the specified size classification into account.
With four piston categories available, the replacement part can be selected according to the actual dimensions of the existing cylinder. This establishes important conditions for correct sealing, the intended heat transfer and reliable engine operation.
An original replacement part for technically correct repairs of 125cc IGET engines used in Vespa GTS, GTS Super, Piaggio Medley, Mymoover Delivery and Aprilia SR GT.
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