Just joined up...thought I should do the right thing by ya's

I'm originally from the uk...down Brighton way..now living it up in the land of sun...and well.... more sun .
I'm a member of the ASF .... Aussie StreetFighters and ride an old skool 'fightered XJR1200.
My reason for joining up is that my wife has a 'fightered zzr600 that she just can't get on with....its just too heavy for her...she's 5' and 45 kilo's.
Rather than sell it, (way tooo many 'mods' to get a legit 'roadworthy test' ) I am thinking about dropping the motor into a zxr frame. She used to have (and loved ) a CBR400rr so I'm thinkin...keep all the fancy 'fighter bits...get a zxr400 frame.....sell off the heavy zzr running gear and bingo.....zxr4/600 'fighter.
Done the search thing...found a few threads but nothing concrete either way....
Look forward to pickin ya brains...if you can tolerate a Yam owner on here
