Due to the fact that the temperature of the oil in four-stroke engines plays an important role we have developed our own SIP oil temperature sensor to combine with our SIP speedometer units for Vespa GTS models. This is plug and play attached to the speedometer using the cable included which is compatible with the spark-plug sensor connection on its rear.
The sensor itself is attached to the engine using the existing drain-plug opening.
SIP - TIP : To ensure the gearbox oil remains in place while riding we recommend the use of a thread lock liquid (#14100000) to hold the new sensor firmly in position!