2 kids on a scrambler?

I’m going up to my uncles farm in new hampshire in a few days and I only have one four wheeler it’s a 2001 scrambler 500 4×4 the question is,is it safe to ride trails with my friend on the back I’m 220 and I’ll be driving and she’s 110 she’ll be riding the back is there even enough room on the seat to do so? And I’m not worried about being comfortable I just want to make sure I’m not setting up a death for both of us