Interesting, it has a, non-standard, non-Monty, kicker on it.
(http://i96.photobucket.com/albums/l187/mx250a/b15f_12.jpg)
(http://i96.photobucket.com/albums/l187/mx250a/b252_12.jpg)
Does anyone recognise it? I've offered up an Yammy RD250 kicker and it looks about right, if a little long.
(http://i96.photobucket.com/albums/l187/mx250a/cp250vr.gif)
Looks right to me. The '73.5 'improved' V75 had the tank bolted from the top - I think :P.
(I'm thinking that kicker is AT/CT1).