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Racing Cylinder POLINI 177 cc for Vespa 125 GTR 2°/TS/150 Sprint 2°/V/Super 2°/PX125-150/PE/Lusso/Cosa

In stock

Part no.: 14000800
Including VAT Free shipping
4,7kg / Piece
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Product image for 'Racing Cylinder POLINI 177 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder POLINI 177 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder POLINI 177 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder POLINI 177 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder POLINI 177 ccTitle' Images may differ from the original
Product image for 'Racing Cylinder POLINI 177 ccTitle'
Product image for 'Racing Cylinder POLINI 177 ccTitle'
Product image for 'Racing Cylinder POLINI 177 ccTitle'
Product image for 'Racing Cylinder POLINI 177 ccTitle'
Product image for 'Racing Cylinder POLINI 177 ccTitle'

Racing Cylinder POLINI 177 cc

for Vespa 125 GTR 2°/​TS/​150 Sprint 2°/​V/​Super 2°/​PX125-150/​PE/​Lusso/​Cosa

  • cast iron
  • 7 ports
  • Ø 63,0mm
  • stroke 57mm
  • 2 piston ring(s)
  • with cylinder head
TUNING ROAD - for everyday use
For race use only. Not admitted in the area of the German StVZO!

In stock

35 ratings
Including VAT Free shipping
4,7kg / Piece

Product description

The King of the 177cc class. POLINI sets the standards with this old school classic, the one all cast iron cylinders have to measure up to.

At the plug and play level, this is a powerful cylinder, and with a 60mm long stroke crankcase, can reach 187ccm - incredible! 7 powerful transfers with a triple boost port feed the cylinder. A generous exhaust port and solid ASSO pistons create a solid support.

Power plus starts in the lower ranges. No problems here with changing up gears. With a longer transmission can operate well as a touring cylinder. If you like, the 20mm carburetor can be replaced with the big brother 24/24 SI, and at least, mount a racing shaft. More power and dependability can be yours by adding combustion chamber and compression optimized MMW MALOSSI cylinder head and the GRAND - SPORT 177ccm piston. A larger racing exhaust, carburetor up to 30mm and a modified outlet will pump up your performance even higher, max around 125 km/h, and bring tears to your eyes.

Conclusion: Robust, hefty torque cylinder for daily use. An absolute all-rounder.


Cast Iron/ 63mm Bore/ 7 Transfers/ 177.68ccm

Cast iron cylinder, 57mm stroke, 7 transfers, piston with 2 thick piston rings, original POLINI cylinder head included in delivery, compression 10.6:1, delivery includes set of gaskets. Jets and ignition should be adjusted. The motor casing should be modified to fit the larger cylinder transfers.


SIP-TIP: W4AC spark plug, ignition timing approx. 17-19°, HD SI 20/20 105-110 are a must, carburettor SI 24/24 or 28-30mm, Italian/SIP/J racing exhausts, longer transmission, light flywheel/SIP Performance ignition and race/long stroke crankcase are recommended, full circle /flowed crankshaft and 30mm reed valve carburettor to bring tears to your eyes on the freeway.


SIP-customer Gerhard J., Austria:

"Absolute optimal, drives like a dream on long distances."


SIP-Man Matze:

"Drove the 177er, 28er and Sito Plus 4300 km from Landsberg in Bavaria to Greece. The cylinder took everything in stride, not a single problem!"


There's enormous potential in the 177cc that can be yours with a little modification. If you don't trust yourself to do a perfect job, then get your hands on the Worb5, and get ready to rumble. Your POLINI can develop it's complete potential first with modification.

With the POLINI W5 177cc Race Cylinder the exhaust grows 2 mm to the right and left and also 1.5 mm above up and below. Your exhaust form will be more square. The piston windows are enlarged. The boost channel exit is more angled and the piston smoothed on the interior.

OEM numbers (for comparisons): 140.0080 (POLINI)
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File name File type Description File size
Technik_Zylinder Technik Zylinder Vespa 46,55 MB Download
140,0080powertest Polini power test 1400080 0,01 MB Download
Tuningübersicht Largeframe Tuningübersicht Largeframe 0,20 MB Download
Technik_Zylinderkopf Technik Zylinderkopf 0,38 MB Download
POLINI177cc_Datenblatt POLINI177cc_Datenblatt.pdf 0,14 MB Download
Dyno_POLINI177 Dyno POLINI 177 0,21 MB Download
Cylinder head technology Cylinder head technology 1,60 MB Download
Cylinder technology Cylinder technology 6,14 MB Download
Tuning summary largeframe Tuning summary largeframe 1,70 MB Download
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