Curtis the earlier bikes really didnt have the chambered mufflers, I searched for some more pics of an RD350 and they all had those straight looking pipes. heres another one
In 1984 I owned on of the last street legal 2 strokes made, it was a Yamaha RZ350, that little bike was wicked but ran out of juice at about 100mph. It came from the factory with expansion chambers. Sold it to buy the FJ in 1986 and my buddy I sold it to wiped it out 1 month later.
