I have a 3012 that has the main counterweight seperate from the thing beside it (further away from fulcrum) that carries the L shaped rod onto which the rider weight sits.
More recently i have another 3012 (from a LWB td125) which is different only in that the main counterweight and the bit that carries the L rod are the 'one piece'.
I think they are both 3012 mkII from the late 60s, early 70s.
Were these arms available in either version ?
Thanks