The device has a motion detector that activate the siren when someone is trying to move your motorcycle
A couple of characteristics to take note of is the fuel sender hole which is slightly different in comparison to the more Modern Vespa PX
Fly 50 4T 2006-2007 (EMEA)
BGM PRO Vespa Oil Seal Set FKM/Viton®(E10 Ethanol Resistant) PX80
The rollers are to fit pre-HPE rollers
Piaggio Vespa PX (1998-Onwards) Speedometer Drive Kit TOPCASE & RACK PX-T5-COSA The device has a motionPiaggio Vespa PX (1998 Onwards) Speedometer Drive Kit Revision kit for the 1998 onwards model of the Vespa PX, suitable for all fork types. Speedometer drive features 12 teeth, and must be paired with the included spacer for installation in the Hub Carrier Assembly. Kit includes a new rubber cover and screw, washer providing a full set. This is a Genuine Piaggio Speedo Kit Disc Model Comparison No. 177508, 174129, 177671, 006975, 031056, 1C001369