I broke it... again...

[OzFab]

What kind of power are you putting to that poor chain?

It's a mildly modded GX160; According to Honda, stock, the newer model produces 7.6 lb-ft (10.3 Nm) @ 2,500 rpm; mine is an old model (don't ask me how old) so, even with the mods, I can't see it producing more than 12-15lb/ft (being generous)...

 

[Whitetrashrocker]

What size chain is it, 40?

 

[OzFab]

#35

Honestly, I can see no reason the chain would snap like this (other than a tiny bit of road rash) apart from it being an inferior chinese product...

Yesterday, while searching for something completely unrelated, I found the rest of the original chain; I bought 6' so, I knew I had more here somewhere; alas, it's about 5 links short

 

[Whitetrashrocker]

Looks like a generic answer to tensile strength.....
#35 is around 2100 lbs
#40 is around 3700 lbs

There's way more involved but like I said it's a generic number.
I'm gonna go with cheap chain.

I got some from the tractor supply, a 10 footer of #40 for about 25 bux.
This is after just a few runs...
https://youtu.be/m-f3DmspIHw