S&S 750cc Big Bore Kit For Royal Enfield Interceptor / Continental GT 650 Ah yes, the age old saying there's no replacement for displacement. S&S's Big Bore Kit includes the bore cylinders, pistons and head gasket to give your Royal Enfield's displacement a big bump up to 750cc. Features: 750cc big bore kit Bore x stroke: 83.5mm x 67.8mm (retains stock stroke) 11:1 compression ratio Kit includes bore cylinders, pistons, and head gasket Made in the USA Note: Requires cylinder sleeving, boring and honing by a professional for proper installation. For closed course competition use only. Not intended for street use. Legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.