2007 Harley FXDSE Screamin Eagle Dyna

To create the biggest of the big, Twin Cam 96 crankcases are machined to accept a pair of big-bore cylinders. Inside, 4.0-inch pistons move through the same 4.4-inch stroke employed in the TC96. But because bigger, heavier pistons would net more vibration along with more power, the 110’s forged slugs are light. Reciprocating mass is essentially the same as in the smaller-bore 96, so both engines use the same crankshaft, flywheel and anti-vibe hardware.