1932 Harley-Davidson Hillclimber
(engine left side)
1932 Harley-Davidson DAH Hillclimber engine
In 1928,  H-D authorized the design of an entirely new 45 cubic inch race motor with the hope of regaining their formerly dominant position in American racing.  Harley's new motor,  an overhead 45 cataloged as the "DAH,"  made its debut at a Pittsburgh,  Pennsylvania hillclimb in July of 1929.

Installed:  April 12, 1997
Revised:  June 28, 2003