Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
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