Piaggio Vespa Starter Freewheel GTS, GTV 250-300 (2008-Onwards)Piaggio Vespa Starter Freewheel GTS, GTV 250 300 (2008 Onwards) The starter freewheel joins the starter engine and crankshaft, enabling the engine to take over when it reaches the required speed. If a cracking sound is heard when starting, this component is likely damaged, and a breakdown of the engine housing can occur if left unresolved. Vespa GTS 250 (ZAPM45101), Vespa GTS 300 (ZAPM45200), Vespa GTS HPE 300 (ZAPMA3600, ZAPMD310), Vespa GTS Super