The incident happened at Rapid Motorbikes in Braidhurst Business Park overnight around 1.40am last Tuesday (September 14).
Before going to press it emerged that a 22-year-old male has been arrested and charged in relation to the alleged incident.
However enquiries are ongoing to identify another three male supects.
They are described as white Scottish with east coast accents.
Anyone with information that may assist in this enquiry please contact 101 and quote incident number 0083 of September 14.