Yep, one of the engines has had rod go through the bottom. Came with brand new crank and rod but the case repair is crap so the engine never got fixed.
Are they really that fragile you cant risk even a gentle ride every so often.? Was it racing pressure that blew them, or they just blew up for the hell of it even on on week end rides.
There must be bugger of them around complete and going if their as big a shitbox as everyone says they are. A very good reason to get them going id say.