Unified police say the man was traveling east on 12600 South in Riverton.
A sewage truck driver was pulling out of his lot at 4425 West and turned left in front of the motorcycle.
The man was wearing a helmet and protective coat.
The 40-year-old died a short time later at the hospital.
A crash analysis team collected evidence at the scene, but at this time police say this simply looks like a terrible accident.