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 All part numbers in BLUE are new for 2025. SECTION 7 538 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”. BLACK EDITION PISTON KITS FOR M-EIGHT •Features ArmorX™ piston coating for superior protection in extreme conditions and reduced wear •ArmorFit™ skirt coating auto-adjusts to the cylinder wall so there’s no need to measure clearance; provides smooth, quiet, trouble-free operation •Dome design for improved flame travel to maximize air/fuel burn efficiency •High compression for added power •Superfinish piston pin reduces friction and improves scuff resistance •Enhanced pin oiling for improved lubrication and reduced friction •Augmented ring land details improve ring seal and function REPLACEMENT PISTON KITS •OEM-quality cast aluminum alloy construction •Some fitments feature pistons with a coating that extends piston life, reduces friction and allows for cooler running engines •Ideal for OEM replacement •Economical with great performance, all in one package •Available in various compression ratios •Kit includes two pistons, wrist pins and clips •Accept OEM or Hastings rings (order separately) PISTON RINGS FOR M-EIGHT •Complete set of piston rings for M-Eight engines •Sold in 2-pack •Made in the U.S.A. DESCRIPTION PISTON KIT PART # REPL RINGS PART # FOR 17-23 M-EIGHT (107”) 3.937” bore x 4.375” stroke, 107 cu. in.; positive dome (+4.2cc) 0903-1551 0912-0927 480” bore x 4.375” stroke, 114 cu. in.; positive dome (-2cc) 11:1 compression 0903-1552 0912-0928 4.125” bore x 4.375” stroke, 117 cu. in.; flat top (+4cc) 11:1 compression 0903-1553 0912-0929 4.250” bore x 4.375” stroke, 124 cu. in.; dished (-9cc) 11:1 compression 0903-1554 0912-0930 FOR 17-23 M-EIGHT (114”/117”) 416” bore x 4.5” stroke, 114” cu. in., 11:1 compression - 0912-0935 4.135” bore x 4.5” stroke, 121” cu. in., 11.3:1 compression - 0912-0936 FOR 17-23* M-EIGHT CVO (117”) 460” bore x 4.5” stroke, 117 cu. in, negative dome (-3.5cc) 11:1 compression - 0912-0934 4.125” bore x 4.5” stroke, 121 cu. in, negative dome (-6cc) 11:1 compression - 0912-0935 4.250” bore x 4.5” stroke, 124 cu. in, negative dome (-9.8cc) 11:1 compression - 0912-0936 PART # DESCRIPTION FOR 17-24 M-EIGHT 107” MOTORS (COATED PISTONS, 10.0:1 COMPRESSION RATIO; 3.937” BORE) 0911-0049 Std. 0911-0052 +.020” FOR 17-24 M-EIGHT 114” MOTORS (COATED PISTONS, 10.5:1 COMPRESSION RATIO; 4.000” BORE) 0911-0053 Std. 0911-0054 +.005” 0911-0055 +.010” 0911-0056 +.020” PART # DESCRIPTION FOR 07-17 TWIN CAM 103” MOTOR (COATED PISTONS, 9.6:1 COMPRESSION RATIO; 3.875” BORE) 0911-0021 Std. 0911-0022 +.005” 0911-0023 +.010” FOR 99-06 TWIN CAM 88” MOTORS (9.0:1 COMPRESSION RATIO; 3.75” STANDARD BORE) 0911-0041 Std. 0911-0042 +.005” 0911-0044 +.020” PART # DESCRIPTION FOR 99-06 TWIN CAM 95” BIG BORE MOTORS (9.4:1 COMPRESSION RATIO; 3.875” BORE) 0911-0080 Std. 0911-0081 +.005” 0911-0082 +.010” 0911-0083 +.020” FOR 99-06 TWIN CAM 95” BIG BORE MOTORS (10.25:1 COMPRESSION RATIO; 3.875” BORE) 0911-0045 Std. 0911-0046 +.005” 0911-0047 +.010” 0911-0048 +.020” PART # DESCRIPTION 0912-0923 For use in S&S 124”/128”/131” M-Eight big bore kits (4.250” bore) •Dedicated rings for precise fit, improved compression and oil control •Fits OEM and Screamin’ Eagle cylinder heads (unless noted) •Kit includes two pistons, rings, piston pins and circlips •Made in the U.S.A. 0903-1551 0911-0053 0911-0042
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