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Cylinder Head MALOSSI W5 136cc

by Worb5 for POLINI 130cc
for Vespa 90-125/PV/ET3/PK/S
Ø 57,5 mm, short thread, squ..
..ish band 1,0 mm, 13,5:1,
incl. O-ring

The MALOSSI 136cc Cylinder Head is the basis on which MMW and Worb5 both work to fit the POLINI 130cc.

MMW updated this cylinder head to fit modern needs. The angle and width of the squish band clearance are modified, the spherical shape of every cylinder combustion area is optimised, the layout for these heads is made of many individually constructed items for ESC pilots. The feedback from many scooter pilots is collected and used. The heads are made for the MALOSSI 136cc, The POLINI 130cc and for GS pistons 130cc to be used in MALOSSI/POLINI/DR 130-136cc cylinders. Higher performance, less pinking, increased durability. These are the positive results of these head tunings. POLINI 130cc profits especially, because the original head often leaks.

Also, the W5 takes the 136cc as basis. Here also is a version for the POLINI 130cc. The head is constructed to enable a higher compression of 13.5:1 and an optimised squish band clearande of 1.0 mm. This makes the MALOSSI head measurably more stable and holds up to pressure better than the POLINI original.

Conclusion: A must have for all POLINI/MALOSSI pilots.


Aluminium/ Ø 57,5mm/ short thread/ with O-Ring

Aluminum cylinder head, massive construction, 57.7 mm Ø, short thread, compression 13.1 - 13.5:1, squish band clearance 1.0 - 1.1 mm, centred central combustion chamber, high quality cast aluminum, with O-ring.


SIP-TIP: Order new spark plug! Clean sealing surface before installation with brake cleaner and make sure to turn cylinder over crossed with the right torque.


SIP Community User "vespa fracks":

"The MALOSSI 136 cc cylinder head has a great price/performance ratio and is well and cleanly made. It's tight O-rings make for better sealing. I recommend this highly".

Customers also searched for this article with:  cilinder head

icon explos Spare Parts Catalogue
This article can be found in the following exploded drawings ... go Go to Exploded Drawings!
11840500 $9.80
88000000 $4.16
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Racing Team 2005-2007 POLINI 130ccm

This item is in stock in sufficient quantity.

920g / piece
Stock on hand   Amount


Pages(s) 131 130 to open.
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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
VESPA 90 90 V9A1T 2T AC `63-`84
VESPA 90 Racer 90 V9SS2T 2T AC `71-`74
VESPA 90 SS Super Sprint 90 V9SS1T 2T AC `65-`71
VESPA 100 (UK) / 100 Sport (US) 100 V9B1T 2T AC `78-`90
VESPA 125 125 VMA1T 2T AC `65-`67
VESPA 125 Primavera 125 VMA2T 2T AC `67-`83
VESPA 125 Primavera ET3 125 VMB1T 2T AC `76-`90
VESPA PK 80 S / Elestart 80 V8X5T 2T AC `82-`86
VESPA PK 80 S Lusso / Elestart 80 V8X5T 2T AC `85-`88
VESPA PK100 S / Elestart 100 V9X1T 2T AC `82-`84
VESPA PK100 XL 100 V9X2T 2T AC `86-`90
VESPA PK125 125 VMX1T 2T AC `82-`85
VESPA PK125 ETS / Elestart 125 VMS1T 2T AC `84-`85
VESPA PK125 N NUOVO (FL) 125 VMX7T 2T AC `90-`91
VESPA PK125 S / Elestart 125 VMX5T 2T AC `82-`84
VESPA PK125 XL / Elestart 125 VMX6T 2T AC `86-`90
VESPA PK125 XL2 125 VMX6T 2T AC `90-

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