Probably a long shot that you will see this, but if you need parts, look at this site: http://www.nwvintagecycleparts.com/
They have many parts for the MG as well as knowledge regarding which YG parts fit the MG.
That is a Yamaha MG1T 'step through model'. I have a '66 MG1t and I love riding it. It has lots of power even with myself and my wife on it. I actually have that same second strap on seat on mine, too.
