So I was able to make a trade on a sitting 2004 rancher at . the bike was sitting in a trailer for the past three years and didn’t move . well I put a new peacock valve ,carburetor , battery.after doing all that my bike wouldn’t shift correctly . so I brought it to my local shop and they replaced the ECM to fix the shifting issues bc it wouldn’t go out of first gear . so after getting it out of the shop I go riding a couple times and I am noticing the following issues . when I am riding 30 mph and above the "D" goes to a" — ". But still runs and acts normal . when I go below 30 or 35 it goes back to the D. Any ideas ?

Also what are the functions of the display or what are the options that I can scroll through or need to know about the display ?