justin_o_guy2 wrote on 04/21/16 at 18:04:17:I'd be taking it apart and checking for damage before I bought parts. Why did it break? I don't remember ever seeing that.
And what damage has been done by the crank, being turned by the starter, stirring that pile of chain?
I'd think about getting the tank off and giving the bike a vigorous shake, then drain the oil into a clean pan. And I would carefully drain that, maybe through a paint strainer, and hunt for bits of anything. Even run a magnet through it, since a steel chain broke.
Eyeball the gears good. If one is burred, smooth it up.
I'd expect a chain to break on the front side and , if everything goes right, fall clear of the crank and not mess anything else up... but,
What's on your side is, with the bike leaning, the chain could fall and not Find the gear teeth again.
I do not know for sure why it broke.
My guess, and only guessing at this moment. Is that the chain doubled up on a gear and snapped it. The break on the chain looks forced and not like a wear.
Tearing into it will only tell.