I own a 1974 125 Primavera, that currently doesnt have a battery or turn lights. I would like to convert it to use a battery and install blinker lights. Do I need to buy a new wiring harness? What else would I have to do? Any help would be appreciated. I live in the USA and there are no Vespa shops within a 3 hour drive, so anything that I could do myself would be best. Thanks for any help.