Thread: Muffler Size

I'm in the process of replacing the muffler on my S1 109. The old muffler is 6" in diameter , the new one is 7"and is interfering with the cross member.
It's obviously the wrong muffler but what model is it off?
.W.

I would say it's for a later 2a long or swb. I seem to recall having 2 similar mufflers some years ago,the older 1 smaller than the other.