HardDrive’s Large Bore Cylinder Kit is an easy way to upgrade your V-Twin. All components are cast from premium materials and the cylinders are powder coated with a machined finish and are perfectly matched to Harley-Davidson engines.
See all horsemanHarley-Davidson’s coverage is here.
All kits feature Cometic head and base spacers, and provide bolting horsepower for easy installation. The 128ci Milwaukee-Eight ($1,298.95) kit takes the original M-8 114ci and 117ci engines to 128ci, with 4.5 inches of travel and 11:1 compression. The 124ci M-8 ($1,298.95) kit brings the stock 107ci engine up to 124ci, with 4,375 inches of travel and 11:1 compression. And the Twin Cam 110ci ($1,244.95) takes the original 2007-2016 96ci and 103ci engines to 110ci, with 4,375 inches of travel and 10.5:1 compression.
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For more information, including charts with orange and ingredient suggestions, see Catalog of hard drives online.
