So that's for real? I thought you took a picture of a bike and homemade trailer that kind of just lined up just right for a picture.
Two stroke bikes were the streetfighters of the 70's. I had a 73 Yamaha RD350 with expansion chambers and it screamed at almost dead stock. I replaced the front drive gear and lost about 10 mph top end and got it back in spades at the bottom. There was a reason they called them the pocket-rockets.
RD were RingDings. They sounded like this as they passed you: RingDingdingdingdingdingdingding...
My brother had a 74 Honda CB350. He borrowed my RingDing for a loop and I heard him open it up on a straightaway around the corner. He came right back all whitefaced and mad. I remember it now, "That's thing's insane! It's got too much power! The front wheel left the ground! You're crazy! Why do you ride a bike like that? That's not safe!!"
In our family scheme of things, he was always the athelete, first string football player at a Div1 school, conference HW wrestling champ, 2 years. I was always more artistic and kind of a pre-slacker bohemian/head. I think he saw me in a different light after he found out what his big brother rode...