All it says is Yamaha MX. thats wrote on the gas tank. Its a mono shock rear end but it runs in the backbone of the frame so I know that its prolly mid-late 70's. I know that Yamaha came up with that design first and ran for a couple years before everyone else caught one. I am guessing by the look of the machine that its definatly one of the earlier ones.
1985 Honda ATC 350X
2003 Yamaha Banshee
2003 Polaris Sportsman 500
There are 3 kinds of people in this world, Those who make things happen, those who watch things happen and those who wonder what the hell happend.