I was looking at purchasing a 2017 Hisun vector 500, used of course. The seller is selling it cheap stating the machine had "an unknown oil leak" and his kids ran it low on oil causing the timing chain to brake. I am not familiar with small engines, but with what is being described, wouldn't this result in some damage to other internal components as well? Just trying to get an idea if the machine is worth fixing or would it likely need a complete engine/overhaul to make it right before I entertain the thought of purchasing it.