Stick Up Cam not sensitive enough

Hi all,I have a one month old 2nd gen Stick Up Camera and I'm already wondering if there is a better product I can upgrade to. I'm just not getting the sensitivity I need. I have a walking path about 100 feet down a hill from my 2nd story deck where the wired cam is mounted. (picture attached). We're having a problem with motorcycles using the path but the cam won't capture them (or anything else on the path), even at max settings. I've added a wifi-extender and also tried tilting the cam to ensure a more horizontal view but no luck. Any advice is appreciated.