Will a 2003 5 speed Softail gearset fit in a 1985 FXR?

A 2003 5-speed Softail gearset will not directly fit into a 1985 FXR due to differences in transmission design and mounting. The FXR uses a different transmission case and mounting points compared to the Softail models. Additionally, the internal components and design specifications vary between these two models, making an exact fit impractical without significant modifications. For a proper fit and function, it's recommended to use parts specifically designed for the FXR.