Hi mate , i also have a 1990 250 beta zero.
<-- heres a pic .
you can find out most of the specs on john lampkins website.
i know the stuff like what plug , what 2stroke ratio e.c.t but id be intrested any other info
we dont get sky till january because my dad has just baught a high resalution 32 inch lcd tv and the 2006 will be in high resalution wich will give a outstanding picture