Getting a check engine light after installing a set of short shots 2015 sportster 48 i cleared the code and it came back could it be a bad O2 sensor the bike only has 1400 miles on it any help would be appreciated thanks

 

A code does not always mean a bad part.
Often it can be a poor connection or a wiring fault.
Make sure the connectors are completely connected and there aren't any pins backed out.

What code did you get?

A lean code could indicate an exhaust leak either at the head or at the O2 sensor.