Hi all, i'm looking for some help. I have a Pantera ATV 90cc for my youngest. I'm trying to do an oil and gear lube change on it. I have the gear lube drained no problem, but not sure what the best grade would be to go back in. My boy doesn't ride it hard but we are going on an all day ride this coming weekend for 2 days. Now the oil is another story. I pulled the plug, when i dropped it out a spring also shot out without the oil. I've stood up the machine, and there is someother type of plug inside that keeps the oil from draining. It looks like it owuld take a phillips screwdriver but there is a bearing in the center of it. Also, this plug looks likes it's threading in thru the drain hole so I dont see the point of the spring. Has anyone encountered this, i'm sure they have but I haven't so i'm desperate for some guidance. haha, i'm not new to off-road bikes just 4-wheelers.