Quote Originally Posted by High_Plains_Drifter View Post
The major difference between the two is a Dyna has an "A" engine, no internal balancers and the engine is shock mounted with rubber engine mounts, and a softail, ala Fatboy, has a "B" engine with internal balancers, won't rev up as fast or as far and the engine is solid mounted into the frame.

Then a Dyna has two outside mounted rear shocks between the upper frame rails and the lower control arm and a softail, ala Fatboy, has a mono shock mounted under the frame to a one piece rear control arm. Then there's also cosmetic differences.

Softails, ala Fatboy, are for stylin'... Dynas are Harley Davisons big twin hotrods.
Man, I thought he was talking about atomic bombs "Little Man" and "Fat Boy".