I hammered this out of a brand new (but heavily modified) GT5 66cc's piston.
The engine ran great for about 5 minutes, and then there was a clunk & it seized. I was just warming it up, and only rode it to get it started. It was idling when it died. I expected to find one of the pin clips came out & jammed in the piston/cylinder, but the cylinder was undamaged & slid right off. A piece of the pin must have fallen down & locked up the crank because that won't budge. I haven't taken the bottom end apart yet to see what's up. I was extremely surprised to find the wrist pin cracked in half like this. There must have been a flaw in it.
Anyone else ever see this?
The engine ran great for about 5 minutes, and then there was a clunk & it seized. I was just warming it up, and only rode it to get it started. It was idling when it died. I expected to find one of the pin clips came out & jammed in the piston/cylinder, but the cylinder was undamaged & slid right off. A piece of the pin must have fallen down & locked up the crank because that won't budge. I haven't taken the bottom end apart yet to see what's up. I was extremely surprised to find the wrist pin cracked in half like this. There must have been a flaw in it.
Anyone else ever see this?