cracked case ....progress...piston questions

[blaster0187]

Can anyone I.d this piston or gimme info on searching?
Jug looks good can still see cross hatch pattern
But I see sum metal chunks there's a few mm play side to side slight up and down

 

[karterphil]

Looks like a cast piston due to the texture on the crown, i think it has been re-bored as its at 66.47mm
There should be slight side to side play for the con rod on the crank, there is a thread on the forum for how much this should be (it can be checked with a feeler gauge but it definitely shouldn't be "a few mm" !!)

 

[Wifesblaster]

I thought stock 66mm was stock bore? You should not have ANY up and down play in the rod.

 

[karterphil]

I thought stock 66mm was stock bore? You should not have ANY up and down play in the rod.

yep my mistake, have edited previous post to suit That would also explain the stamped "50" in the center of the crown