Now our Twin Cam "A" rebuild moves to the oil pump and camplate. As you may know from parts 1 and 2 of this story, we pulled the tired Twin Cam mill out of a `99 Harley-Davidson FXDX at the 100,000 mile mark to rehab the poor thing back to full strength.
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.