If you want to get back the possession of your vehicle you can do so under the Specific Relief Act,1963. Since the scooter is registered under your name, you can file a suit for recovery of possession which can be done under the Specific Relief Act,1963. Section 7 and 8 of the Act contain provisions for the recovery of possession of a specific movable property.
Section 7 says that a person entitled to the possession of the movable property may recover it according to the manner provided under Civil Procedure Code,1908. Before filing the suit before a civil court, you should make sure that you have the right to immediate possession of the property. According to Section 91(b) of the Limitation Act, 1963 the suit of recovery should be filed within 3 years from the date when the property is wrongfully taken.
Section 8 of the Specific Relief Act,1963 says that the person who is not the owner of the property shall be specifically ordered by the court to deliver it to the person entitled to the immediate possession of the said property. Therefore, you can contact a lawyer to file a suit under-recovery of possession and he can guide you as to under what section the suit can be filed and the proceedings for the same.