Last week I was letting my kids friend ride the rancher. It died on him. When trying to start it it sounded very tingy. Long story short the oil drained out of the engine while he was riding it.

I changed the oil and filter and restarted it. It runs but it sounds a little ticky. Also, it seems to have not as much power.

My friend suggests the top end probably needs rebuilt. Can I please get some advice from you all? Where should I start?