background graphic
background graphic
Revolution Performance logo and home page link

A subsidiary of

Millennium Technologies Parent Company






HOME » Sportster Big Bore Kits

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 COMP. RATIO PRICE
1250cc Bolt-On Black Highlight, Black, Natural 10.5:1 Dome $1199.95
90" Monster Black Highlight, Black, Natural 10.5:1 Flat-Top $1199.95

NOTE:Compression ratio is dependent on the cylinder heads combustion chamber volume

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

Price subject to change without notice