I bought the MNNTHBX Rear shocks, and they seem a little stiff for me at 185lbs also, but a lot of my riding is a slower speed on smaller roads. The roads i have ridden at a higher speed, theyre perfect. I also tend to sit up on the tank more, coming from a motocross background.
You can find those here: MNNTHBX Billet Shocks for Honda Monkey 125 - MNNTHBX
You can find those here: MNNTHBX Billet Shocks for Honda Monkey 125 - MNNTHBX