for Vespa 125 PV/ET3/PK125 S/N
also for Vespa 90/SS,
As the Vespa engine is generally covered by a side panel, it cannot be cooled by the head wind and needs intensive cooling. In addition to the heat-dissipating cooling fins of the cylinder (head) and the flywheel, the cylinder cowl plays a crucial role here. It conducts and distributes the air coming from the flywheel (which is driven over the flywheel cover and an air duct to the engine block in the direction of the cylinder) and thus ensures sufficient cooling of the cylinder, cylinder head and exhaust. If one drives without a cylinder cowl, the engine may easily overheat and a piston seizure will soon occur. Like the wideframe models, the 1st series of the Vespa 50 N and the large frame models of the 1960s and 1970s also have a metal cylinder cowl. The cylinder cowls of the other small- and largeframe models are made from plastic and, in addition to classic black, are also available in a wide range of colours from carbon look to polished stainless steel and chrome effect. The transparent small frame cylinder cowl (#15073980) is a particular eye-catcher here which enables an unobstructed view of the cylinder.
Conclusion: Essential for adequate cooling of the engine.
SIP TIP: if a smallframe is converted to 125ccm, it requires a 125 ET3 cover (PART No 15073900). It is recommended that you order this at the same time.
SIP Community user "gigxy" (about PART No 15073900):
"Fits and sits very well".
OEM Numbers (for the purpose of comparison)
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cylinder head cowling, cylinder shroud, cilinder cowl