I'm going to look at this quad tomorrow to purchase for my daughter. I had a 50 back in the 80's, and my nephew has a 50 that is a 2004 two stroke.

This one is a four stroke. What things should I be looking for? How often should the oil be changed, and where do I check it for quality? I really appreciate all responses. I've been searching the net for a few hours with nothing. I did a search here and didn't turn up anything pertaining to my questions.

 

I'm sure they are a fine machine for a young rider.
They are slow as molasses and have little power (4 stroke) but a fine machine.