my vespa et4 had battery removed for one year fitted new battery cannot program immobiliser now does it lose its memory the dealer told me it has to be transported to his work shop.
ET4 are devils when they do this. Have you the red key and a manual, if so you can do it yourself. It will take a few mins. You will need a manual though. You can prob search on net for a manual. You can buy CDIs which bypass immobilisers.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix motorcycles.