That sounds just like FatJocks did (he let me ride it) before it came apart.Hi Quantum. The reason for saying the big end has gone is based on talking to my mechanic. The noise is akin to a mini anvil being struck with a hammer. It sounds the loudest on heavy acceleration, but not on overun. On tickover there is no sound. Any help?.
Yup, Mine blew at around 60mph, around 30 miles from home.......when I got it apart, the bottom end and the rod were fine, piston was in "a million little pieces", and the sidewall of the cylinder ripped asunder. The exhaust valves were also bent.That sounds just like FatJocks did (he let me ride it) before it came apart.
Piston and rod were shot and he posted pics here about 6 months ago.
Might try a search and check it out.