I had one of the old 90's. It was grossly underpowered. 2 different times I had to unload deer because it couldn't pull it, even on roads. A 125 should be a big improvement IF it has a low range. If it doesn't I wouldn't waste my money.
RC, I don't know how big your deer are, but I pulled a fork horn and an 8 point out to the truck down a logging trail with a Yamaha 50cc Mini Enduro. The key is to get the head up as high as you can on the seat, so lots of it is off the ground. Darn 8 point punched a bunch of holes in the seat though. Admittedly I spent a lot of those 2 pulls on the rear wheel of that little bike, but it did it. If you want to haul deer or bears out of the woods, nothing on two wheels beats a Kohler engine Rokon.
Just a thought. I'm at 550' above sea level and elevation robs horse power and guaranteed that ID. is way higher than WI.
