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OEM-Qualität Item number: 7675722
OEM-Qualität

Breaker cam / cam ignition contacts -VESPA- Vespa GS160 (VSB1T), GS4 - Ø inside: 19mm

Type: Breaker cam / ignition contact cam
Fits: Vespa GS160 / GS4
Ignition: original breaker ignition
Internal dimension: Ø19 mm
Important: Felt must be clean and lightly greased
Note: Key no longer available, PX crescent can be adapted
34,90 €*
available immediately
Shipping weight 0,007 kg
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Breaker cam / cam ignition contacts Vespa GS160 / GS4, Ø inside 19 mm

Suitable for Vespa 160 GS or GS4 with original breaker ignition.

This breaker cam is the right spare part for the original ignition system of the Vespa GS160 / GS4. It actuates the breaker mechanically and is therefore directly relevant for correct ignition timing. As soon as the cam, groove or seat are worn, the ignition becomes inaccurate and should be repaired.

GS160 / GS4 Interrupter ignition Ø19 mm inside classic Vespa ignition

Why the cam is important

clean ignition triggering: the cam directly determines the opening point of the breaker
Stable ignition timing: ignition remains reproducible only with a clean running surface, intact groove and tight fit
less wear: correctly lubricated contact area protects the friction block on the breaker hammer

Important for a long service life: Lubricate the felt cleanly

The felt piece for lubricating the cam must be clean and should be lightly coated with grease. This minimizes wear on the bearing of the ignition contact hammer and keeps the ignition timing clean for longer.

Note on the feather key / crescent key

The original feather key (colloquially known as crescent key) is no longer available for this cam holder. This feather key is shared by the following vehicles:

Vespa 160 GS (VSB1T) from engine number 36098
Vespa 180 Super Sport (VSC1T)
Vespa 180 Rally (VSD1T)
Vespa 200 Rally (VSE1T) up to chassis number 33996
The feather key is only used for fixing and positioning and does not transmit power.
A half-moon wedge from the PX models, for example, can be adapted as a replacement.
Practice: File the height of the PX half-moon flatter until it fits properly for this application.

Technical data

ComponentBreaker cam / cam ignition contacts
VehicleVespa GS160 / GS4
Ignition systemoriginal breaker ignition
inner dimensionØ19 mm

Conclusion

The breaker cam for the Vespa GS160 / GS4 is a small but ignition-relevant component. With clean lubrication on the felt, an intact groove and correct seating, the ignition timing remains stable and the original breaker ignition works reliably.

OEM numbers (for comparison purposes only)
Piaggio:
57778
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