Engine lite came on so I added oil , says do not overfill, I might have. At only 6400 miles on my 2014 low rider I believe I hade acceleration problems, less compression.What caused this? I added synthetic to conventional, and slick 50. Dan because it was the only thing I had when lite came on I assumed it was low after a poker run ride.

 

What makes you think you lost compression?
The engine light came on because the bike threw one or more diagnostic codes. Pull the codes and see what it says. https://www.fuelmotousa.com/p-29661-...ble-codes.html
Check you oil level before you go out again, you don't want to have too much in there. And you don't need Slick 50.

 

Sounds like the motor is sumping.... To much oil in the case and not scavenging properly​.... Get your manual out....