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Piston -VESPA- Vespa ACMA 150cc (1955-1958) - 58.5mm (standard)

GL109B1
Piston -VESPA- Vespa ACMA 150cc (1955-1958) - 58.5mm (standard)
Piston -VESPA- Vespa ACMA 150cc (1955-1958) - 58.5mm (standard)
Piston -VESPA- Vespa ACMA 150cc (1955-1958) - 58.5mm (standard)
Piston -VESPA- Vespa ACMA 150cc (1955-1958) - 58.5mm (standard)

Description


Piston - VESPA Nose Piston- Vespa ACMA 150cc (Y.o.1955-1958)

Replacement piston for the 150ccm cylinders of the Vespa ACMA (BJ.1955-1958) - 58,5 mm is the standard dimension.
Nose pistons are used in cross-flow scavenged two-stroke engines to keep the fresh gas flow away from the open exhaust. The nose sits on the piston crown and deflects the gas flow upward. The inlet cross-section can be larger than in cross-flow scavenged engines with flat pistons. Nose pistons also cannot prevent fresh gas from escaping into the exhaust at all loads and speeds, and they cause an unfavorable combustion chamber shape. After reverse scavenging was developed in the 1920s, cross-scavenged engines became less important.

TIP: Always install piston rings carefully. Piston rings made of cast material are only elastic to a limited extent and break relatively quickly.


(TW180122)

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€63.95 *

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Estimated delivery date: 23/06/2021

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Available versions

Part no.: Diameter Price Stock Cart Save
Part no.: GL109B1 Diameter Ø=58.50mm Price
€63.95
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Part no.: GL109B2 Diameter Ø=59.00mm Price
€59.00
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Available immediately (delivery time 1-3 working days*)
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Part no.: GL109B3 Diameter Ø=59.80mm Price
€63.95
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Part no.: GL109B4A Diameter Ø=60.00mm Price
€63.95
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Part no.: GL109B4 Diameter Ø=60.40mm Price
€63.00
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Piston - VESPA Nose Piston- Vespa ACMA 150cc (Y.o.1955-1958) Replacement piston for the...Continue reading

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