I just got a 2002 ultra 150 with 77 hrs on it. I took it out for the first time and it went 36 mph then fell on its face then wouldnt go over 3800 rpms so I put it on the trailer . No warning lights but felt like limp mode. Found the problem torn fuel pump diaphram replaced it with new plugs and new gas runs the same wont go over 3800 rpms. Is it possible to get into limp mode with no warning lights? How do i do a reset? Thanks!