Early Swingarms

[Grewth]

Q. Do XS1, XS1B, and XS2 all have the same swingarm ?
Second hand spares dealers seem to think so, but I seem to remember reading somewhere that the swingarm grew a little longer in an atempt to improve handling.
Possibly when the XS2 was introduced ?
Could someone who knows please advise ?

 

[Jim]

Yes. In the back of my mind I was thinking '74 was the first yr of frame changes. Partzilla seems to confirm this. '70 to '73 shared the same swingarm.

 

[Grewth]

Many Thanks, Jim !
I was actually on Partzilla looking before I made the OP, but I just can't seem to get on with it.
Maybe because I'm working from an Android phone, or maybe I'm just clumsy ??