The last phase of our Twin Cam A reworking takes us from the tappets to the carburetor. For you kids just now joining us at home, Hot Bike pulled the worn Twin Cam “A” motor from a 1999 FXDX out of its chassis at the 100,000 mile mark.
We broke it down, inspected it, and then sent the lower end to Darkhorse Crankworks (DHC) so its squad of bottom-end experts could rework the tired components. Working with Dave Mackie Engineering (DME), we concocted a solid 107ci top end using bored H-D cylinders and some DME Mega-Sphere pistons, complemented by a DME cam. Both DME and DHC are known for their superior quality and attention to detail, so it was a pleasure to assemble this motor knowing the end result would be a powerful yet balanced blueprinted motor.