The flat plate mounts in from of the battery box and helps to support the airbox. The hump piece is part of the rear fender mount. And the small piece looks like maybe it's a helmet hook where someone cut the hook off?
'78 Z1-R in blue, '78 Z1-R in black, '78 Z1-R in pieces
'95 GPZ1100 (sold) , '00 ZRX1100
Thanks guys. I'm pretty sure Jim's right about the helmet hook. I'll have a look tomorrow, I imagine that the hook broke off - can't see anyone going to the trouble of cutting it off, pretty sure it'd just end up in the bin if it wasn't wanted...
Looks like I'm missing part number 18 in the battery box diagram. CMS doesn't list the part - any idea what part number it is and what it's for?
Interesting - it's not in the parts list on CMS but is in the diagram. The part you linked is only used on the A3 and A3A (in the list it says 77 A1 but in brackets it specifies the diagram for the 79-80 models). Maybe I don't have to search the garage after all
Anyone have any photos of where the tool case goes? Didn't have one on the bike but you can get replika ones pretty cheap so might be worth it.