Greetings from a lovely sunny day in geordie land! 
I'm after a little bit of help. 
I have a '87 FZ400 project bike, all is going well so far, but today One of my sump plugs broke when I was tightening it up after removing it. 
Now, I know the FZ400 was a 'grey' import to the UK, and that the FZ600(late 80s models) was a UK bike with virtually everything the exact same as the 400 except engine and clocks, and possibly other bits. 
I know this as I've got an exhaust set from a 600 on my 400, and when I looked at the 600 in the scrap yard I could tell most was the same. 
Anyway back my ordeal,  Does anyone know which other bikes sump plugs would go into my FZ400? its like a very big thread, on wemoto.com they're selling a magnetic one for the FZ600 (late 80s models) I'll probably go for that as a replacement. 
 
Any help is greatly appreciated.  
 
Ginger Chris