Piaggio has been using a modified upper headset bearing on their new cars for some time now.
This has slightly larger balls (4.0 instead of 3.2mm) and therefore offers improved durability due to the increased contact area of the balls.

The bearing shells have a matching radius.
Therefore, the two available bearing ring types (3.2mm and 4.0mm) cannot be exchanged with each other.

IDENTIFICATION
Older vehicles generally use the small version with 3.2mm (unless the control bearing has already been exchanged for the more modern type).

TIP
If there is no old bearing ring available for measuring the balls, we recommend to replace the complete head bearing set. As a rule, it is always the shells that wear out, not the balls.

balls = 1/8 = 3.17mm + 1/4 = 6.35mm


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Anonym  11/05/2014

Super Qualität Sofort weiter zu Empfehlen

Anonym  02/26/2016

Répond à mon attente

Anonym  12/25/2014

Sehr gut.

Anonym  05/12/2015

Qualität ist super

Anonym  02/19/2016

Super Qualität

Anonym  05/19/2016

exhelent

Christian C. from Meerbusch 08/21/2025
Anonym  09/15/2025
OEM numbers (for comparison purposes only)
Scooter Center:
7800011
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