I picked up a '76 vespa ciao yesterday at a garage sale and today I got the carb and tank all clean up. I took it out for a test ride and it started right up and ran alright. I rode it around as best I could with a crimped throttle cable. Here's the thing...the motor was making a smooth sound but there was also this very loud whining sound eminating somewhere from the front of the bike. It would increase and decrease with engine speed. It really sounded like it was coming from the front wheel, but i can't find anything obviously wrong. Could it be the belt drive..slipping or too tight?? Where else should I look? Thanks.
p.s. I'm also looking for some parts if anybody has any.