The Datatool S4 (whatever version) does have a very sensitive movement sensor but it is adjustable...... by the dealer only, and it is quite a complicated awkward programming procedure that needs the PIN code. It would be no surprise if the dealer didn't want the aggravation of making the adjustments........ however, I have found that if the unit is not very firmly secured on the bike, using cable ties tightly round both the unit and it's wiring loom AND that foam padding is used on the back of the alarm, these alarms are susceptible to going off for no apparent reason.
To be fair, I have only had to replace 3 of these systems over a period of several years (during which time I have fitted maybe 2 or 300?) but all three were due to false alarming movement sensors.
There is absolutely no excuse for the dealer not to sort this problem out....... is the unit and it's wiring secure and has the sensitivity been reduced - if yes, then replace the alarm..... simple!
Mainly on earlier alarms, I have known external radio signals to both set off alarms and more commonly to "block" a remote control from operating an alarm (you would have to push the bike 10-20 yards up the road then "hey presto", all is well). Modern alarm systems, such as the S4, are tested at "Thatcham" (by the Motor Insurance Repair Research Centre) for EMC (electro magnetic compatibility).... which means that the alarm should not be affected by "interference" (such as WiFi) and that the alarm shouldn't affect the bikes operation..... so none of us should ever suffer alarm problems then!!! Wishful thinking!