Re: ’58 Big Twin Lower Crank Seal

[chris-p]

Fleetwin, Yes always used a quad ring. I have never found any evidence against that anyways? Has anyone else?

Something else to note. The carbon seal itself was updated at some point, I forget what year off hand. The 302538 seal had a narrow face machined on the lower side of the seal which abutted the bearing. The original seals are straight and flat. This narrow face provides a better seal, and prevents oil from accumulating on the mag plate, for the top seal.

If you take a motor apart, and find the flat carbon seal, you should update it to the one with the machined face.