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Racing Cylinder POLINI 177cc

for Vespa 125 GTR 2°/TS/150
Sprint 2°/V/Super 2°/PX125
Ø 63,0mm, aluminium, 5 ports,
stroke 57mm, 2 piston ring(s),
with cylinder head


The all-new POLINI 177cc aluminium race cylinder is the return of a tuning legend, with a fresh lightweight concept. Unlike its cast-iron predecessor the newcomer is constructed using aluminium combined with a very robust bore lining material. The more complicated manufacturing process of this type of cylinder provides this Vespa largeframe all-round performer with greater thermal stability and longevity.

Alongside their choice of aluminium POLINI also included a few other new features. The cylinder head design provides the choice between using a centrally-located spark plug or the standard offset position. A blanking screw for the spark plug thread not in use is included in the kit. The cylinder head is also equipped with eight fixing points, ensuring sufficient compression without mechanical tension.

The outlet port has also been redesigned and the exhaust manifold stub is made of steel and is screwed into place. This makes it not only much tougher and replaceable, but also much easier to modify once removed.

The 63mm diameter piston has two 1mm thick steel piston rings and the port layout, with 5 transfer ports and a single exhaust port, is traditional. This cylinder kit is conceived for use with a 57mm stroke crankshaft.

According to the engine this racing cylinder mounted on a taller primary drive is often useful.


Aluminium / 177cc / Largeframe / PX 125 / Tuning


Conclusion : A tuning classic with an almost universal field of use, provided with a state of the art update!


SIP - TIP : Do not forget to order new crankshaft bearings and oil seals! We recommend the use of a SIP Sport clutch (#93246000) with this kit for perfect power transmission!

OEM Numbers (for the purpose of comparison)  140.0081 (POLINI)

Customers also searched for this article with:  race cylinder, performance cylinder, race cilinder, tuning cylinder, aluminum, alluminium, ally, ally, aloy, alloy

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2,900g / piece
Stock on hand   Amount


Product forums
Spare Parts
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
LML Star 125 2T/ DLX / Via Toscana / Deluxe 125 2T AC
LML Star 150 2T / DLX / Via Toscana / Star / Stella / Belladonna RV 150 2T AC
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 125 GTR 125 VNL2T 2T AC `68-`78 138957 ->
VESPA 125 TS 125 VNL3T 2T AC `75-`78
VESPA 150 Sprint 150 VLB1T 2T AC `65-`74 105200 ->
VESPA 150 Sprint Veloce 150 VLB1T 2T AC `69-`79
VESPA 150 Super 150 VBC1T 2T AC `65-`79 328129 ->
VESPA COSA 1 150 VLR1T 2T AC `87-`90
VESPA COSA 1 125 VNR1T 2T AC `88-`91
VESPA COSA 2 150 VLR2T 2T AC `91-
VESPA COSA 2 125 VNR2T 2T AC `91-
VESPA P125X 125 VNX1T 2T AC `77-`82
VESPA P150 S 150 VBX1T 2T AC `78-`90
VESPA P150X / PX150 E 150 VLX1T 2T AC `78-`85
VESPA PX125 2011/ 30 Jahre 125 ZAPM74100 2T AC `11-
VESPA PX125 CAT 125 ZAPM50100 2T AC `07-
VESPA PX125 E 125 VNX2T 2T AC `81-`83
VESPA PX125 E `98 / Millenium 125 VNX1T 2T AC `98-`05
VESPA PX125 E Lusso/EFL/Arcobaleno / Elestart 125 VNX2T 2T AC `83-`97
VESPA PX150 2011 150 ZAPM74200 2T AC `11-
VESPA PX150 E `98 / Millenium 150 VLX1T 2T AC `98
VESPA PX150 E Lusso/EFL/Arcobaleno / Elestart 150 VLX1T 2T AC `83-`97

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