Originally Posted by RodT
I am in the process of restoring a 1969 AT-1M with matching numbers and i need a MX expansion Chamber with the perforated leg guard, If you have such a item pm me with a price. Thanks Rod
I had a 1969 AT-1mx as did a several of my buddies. The one thing I remember quite well is that the material Yamaha used was very brittle and the pipes broke like crazy. The same for the perforated heat shield. If you are lucky to find one intact, I'm willing to bet it was pulled off the bike with less than 20 hours on it.
BTW, that pipe was also part of what was known as a "GYT kit" (get kit). The same pipe was used on the CT-1 (175cc).