Yamaha Aerox 100 non starter after replacing ignition ?

i have a Yamaha aerox 100 it was vandalized when someone tried to steel it and recovered by the police then it sat in their yard for forensics for a few months i have had to replace the steering lock & ignition (comes as one unit) and all the locks and put a new battery and spark plug in which was no problem however it refuses to start its a 2004 model but has the pre 2004 ignition without an immobilizer but it just will not start no mater how hard i try anyone with an idea or had this problem before please let me kno thankyou