@ 2 years after my Z900 was stolen the police contacted me saying they had found the motor or what was left of it in Lake Monger (Mung-ger) did I want it so I said yep I get it all that was left were the crank cases all the internals with 4 pistons poking out the top all nicely rusting and oxidizing after 2 years sitting in the lake. The insurance Co rang me not long after and wanted to know if the bike was salvageable I just laughed at them.
They traced me through the serial on the engine which had been ground off but the imprint goes through on a molecular level in the aluminium or steel and they xrayed it to see the serial No. stupid me threw the cases & gears etc out those cases now would be worth pretty penny to a Z900 restorer as they are a matched pair.....dummo me.