Rebuild Bottom End 1970s 74in Shovelhead

[fbn ent]

"see the above... S&S built a 100 inch Evo just for the 4 speed frame...
While Harley built a 4-speed frame, just for the Evo engine... 1985 and 1986...''

Yeah..knew that..

[Burnout]

The short stroke (4") is what makes a 4x4 fit in a 4 speed frame, it uses shorter cylinders.

Anything with a 5" stroke is going to need tall cylinders.