Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
I fitted this to my UK 1978 400. It fits and works fine.https://www.ebay.co.uk/itm/HONDA-CB-350-400-450-500-550-650-750-Four-Lenkschlos-Lenkradschlos-steering-lock/362013943899?hash=item5449b6685b:g:hTkAAOSw241YhOMx