FOR HARLEY DAVIDSON SPORTSTER ENGINES

Revolution Performance offers two different type of big bore kits for the Sportster engine. Bolt-on big bore kits and monster big bore kits. Bolt-on big bore kits are exactly that, a bolt-on application for your Sportster engine. No case boring or additional modifications/upgrades needed. However, additional modifications/upgrades will help make this bolt-on big bore kit a complete package. Monster big bore kits require modifications/upgrades to your engine that include: case boring, crankshaft balancing and CNC cylinder head upgrades.



Available Sportster Big Bore Kits

CUBIC INCH COLORS
1250cc Bolt-On Black Highlight, Black, Natural
90" Monster Black Highlight, Black, Natural

For more information or to order big bore kits, please contact us direct at: 1-866-892-2109