[Richard230]

Here is my experience with a stock connecting rod in a hopped-up engine.   

[zimmemr]

Here is my experience with a stock connecting rod in a hopped-up engine.   

Ran her a little lean did you? Or did it just overheat and tie up?

[Arschloch]

I think too that the piston sized first causing all that extra damage. Have seen something simillar on a stock 2 stroke setup, the guy would put his cylinder for repair and put an oversized piston in it. The bore in the cylinder didn´t get increased by the amount specified, he didn´t check it. Piston sized and the conrod tore apart, bending and finding way into the transfere port of that cylinder.

[zimmemr]

I think too that the piston sized first causing all that extra damage. Have seen something simillar on a stock 2 stroke setup, the guy would put his cylinder for repair and put an oversized piston in it. The bore in the cylinder didn´t get increased by the amount specified, he didn´t check it. Piston sized and the conrod tore apart, bending and finding way into the transfere port of that cylinder.

That'd be my opinion. I've seen dozens of two-strokes snap or bend the con rod when they seized. Especially on small bore bikes, 125's and the like.

[Richard230]

The odd thing is that the bike ran fine for about 3K miles before the "incident".    The piston apparently seized solid in the bore and the irresistible force met the immovable object (the piston). But that happened at a stop sign while the engine was idling and not after a hard ride. Anyway that cute motorcycle is now long gone and is just a memory, but I still have some nice photos of it in my files.