dragspecialties.com All part numbers in BLUE are new for 2025. SECTION 7 WINDSHIELDS & FAIRINGS AUDIO, COMMUNICATION & MOUNTS SADDLEBAGS & LUGGAGE SEATS & SISSY BARS FUEL/AIR SYSTEMS EXHAUST TRANSMISSION & DRIVELINE ENGINE GASKETS & SEALS LIGHTING ELECTRICAL HANDLEBARS, CONTROLS & MIRRORS CABLES TANKS & OIL FILTERS BRAKES DASHES & GAUGES FENDERS & LICENSE PLATE FRAMES HARDWARE, COVERS & GENERAL FRAMES & SUSPENSION FOOTRESTS & FLOORBOARDS WHEELS & AXLES 750 See OLDBOOK For Early Model Applications DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 5-7 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. PART # DESCRIPTION 143” KITS FOR 17-24 M-EIGHT 114”/117” 4 1/2” BORE; 4 1/2” STROKE; 11.4:1cr (WITH 88cc HEADS) 0931-1052 Black w/ highlighted fins 0931-1054 Black 139” KITS FOR 17-24 M-EIGHT 114”/117” 4 3/8” BORE; 4 1/2” STROKE; 11.2:1cr (WITH 88cc HEADS) 0931-1050 Black w/ highlighted fins 0931-1051 Black 131” KITS FOR 99-17 TWIN CAM S&S 4 1/4” BORE; 4 5/8” STROKE W/ 7.669” RODS; 11.2:1cr (WITH 86cc HEADS); 10.6:1cr (WITH 95cc HEADS) 0931-10481 Black w/ highlighted fins 0931-10491 Granite w/ highlighted fins 124” KITS FOR 99-17 TWIN CAM 4 1/4” BORE; 4 3/8” STROKE; 11.2:1cr (WITH 86cc HEADS); 10.4:1cr (WITH 95cc HEADS) 0931-1046 Black w/ highlighted fins 0931-1047 Granite 117” KITS FOR 99-17 TWIN CAM 4 1/8” BORE; 4 3/8” STROKE; 11.2:1cr (WITH 86cc HEADS); 10.3:1cr DOME PISTONS (WITH 95cc HEADS) 0931-1044 Black w/ highlighted fins PART # DESCRIPTION 117” KITS FOR 99-17 TWIN CAM 4 1/8” BORE; 4 3/8” STROKE; 10.5:1cr (WITH 86cc HEADS); 9.8:1cr DISHED PISTONS (WITH 95cc HEADS) 0931-1042 Black w/ highlighted fins 0931-1043 Granite w/ highlighted fins 90” KITS FOR 91-20 XL 3 7/8” BORE; 3 13/16” STROKE; 10.5:1cr FLAT-TOP PISTONS (WITH 62cc HEADS) 0931-1071 Natural silver 0931-1072 Black w/ highlighted fins REPLACEMENT HEAD AND BASE GASKET SETS 0934-7162 For 139”/143” M-Eight w/ 4 1/2” bore, 0.030” head gaskets/0.014” base gaskets 0934-7161 For 124”/131” Twin Cam w/ 4 1/4” bore, 0.030” head gaskets/0.020” base gaskets 0934-7160 For 117” Twin Cam w/ 4 1/8” bore, 0.036” head gaskets/0.030” base gaskets 1 Requires use of 4 5/8” stroker crank with 7.669” rods. MONSTER BIG BORE KITS •Revolution Performance cylinders are aerospace-grade all-aluminum cylinders with nickel-silicon-carbide (NSC) electroplated bores •NO SLEEVING allows for larger bore sizes •NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan •Maximizes cubic inches for increased power output with added durability and strength •Requires case boring, which is not recommended on OEM cases 95-earlier; some kits also require a 4 5/8” stroke crank •Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set •M-Eight kits include pistons with line-to-line coated skirts for zero install clearance •Replacement gasket sets available separately •Made in the U.S.A. NOTE: Upgraded cylinder studs and head bolts required (sold separately). NOTE: For replacement pistons and rings, see Revolution Performance Big Bore Piston Kits on pages 774-775. 0931-1054 0931-1043 0931-1050 0931-1071 0934-7161
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