4x4 Harbor Freight trailer Motorcycle trailer

Building this (sketchy lol!) Harbor Freight trailer for my ZX6R for track days. Actual dimensions are 40 1/2" x 48". I put a 40 1/2" x 6' Plywood on top and a rail to better support the bike. Testing on the road I was surprised how smooth it was. I took it on the freeway and was going a steady 60mph. Overall it works for just what I need.