Rutteger,
Measured centre to centre the seat tube is 19" and the top tube is 23".
Significantly the Buckshaver has wishbone seatstays (the Yo! doesnlt) and I believe it was designed as a more compliant and forgiving bike than the Yo! (I'm sure some of the other users here could go into far greater detail than I ever could).
The seat collar is the original Fat one with an X-Lite bolt and the seatpost is a good condition inline post (copy Syncros) this can sort of be seen in the picture. The frame also has the original toothpick chainsuck plates fitted.
There may be a little felixibility on the price.
Mail me if you'd like any further details at
stuart@chasetrails.co.uk.
Thanks
Stu.