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 SECTION 7 All part numbers in BLUE are new for the OldBook. 303 See FATBOOK For Late Model Applications DISCLAIMER: SEE PAGE 5 FOR IMPORTANT INFORMATION REGARDING CERTAIN WARRANTY AND EMISSION CONTROL REGULATION COMPLIANCE AND NOISE REGULATION INFORMATION. PART # DESCRIPTION 0920-0008 For 93-99 Evolution Big Twin-style engine (standard size reed valve) CRANKCASE BREATHER REED VALVE • New-style breather is not dependent on the rotation of the crankshaft to make it open and close; instead, reeds open when pressure in the crankcase becomes greater than pressure in the cam chest, and close when pressure in the cam chest is equal to or greater than pressure in the crankcase • By opening and closing “on demand,” the reed valves automatically compensate for lag time associated with accelerating the mass of air as it is forced out of the crankcase, increasing performance and stopping high-rpm oil carryover in engines with marginal piston ring seal • Installation is fast and simple; no aligning timing marks, and no rotating parts • Made in the U.S.A. PART # DESCRIPTION FOR L77-99 EVOLUTION BIG TWIN; REPL. OEM #25313-88B DS-194242 Standard kit 212431 Standard w/ gear only DS194471 +.030” oversize kit 212432 +.030” oversize w/ gear only FOR 66-E77 SHOVELHEAD 213323 Standard w/ gear only STEEL ROTARY BREATHER GEAR KITS • All-steel construction • Welded-in screen • Higher flow than stock • Elongated breather pocket scavenge hole for increased suction • Available in standard or +.030” diameter • Kits include gear and spacer PART # DESCRIPTION FOR 77-99 BIG TWIN 146978 Standard size BREATHER VALVE GEAR • Steel replacement breather valve gear • CNC-machined aerospace quality steel • Offers precise control of exhausting crankcase pressure • Sold each PART # DESCRIPTION 147566 For 77-99 Big Twin; repl. OEM #2337ST BREATHER VALVE GEAR WITH ELONGATED OIL HOLE • Elongated rear hole to aid in better crankcase flywheel cavity vacuum • CNC-machined from aerospace-quality steel • Designed to replace OEM plastic gear PART # DESCRIPTION DS-194254 For S&S breather gears on 36-99 Big Twin models AIR RAMP FOR S&S BREATHER GEARS • Increases cfm flow by approximately 80% • Helps remove more air and oil from the crankcase • Made in the U.S.A. NOTE: Requires the removal of the screen on S&S breather gears. PART # DESCRIPTION 213756 .100” (ea.) 0932-0141 .110” (ea.) 212435 Assortment (8-pk.) BREATHER GEAR SHIMS • Steel shims PART # DESCRIPTION DS-194160 For 82-99 Big Twin; repl. OEM #25320-82 PLASTIC BREATHER VALVE WASHER SET • Sold in set of eight in sizes: .130”, .135”, .140”, .145”, .150”, .155”, .160” and .165” • Made in the U.S.A. NOTE: Use only plastic washers with plastic breather valves. Do not intermix plastic and steel parts. 0932-0141 DS-194242 DS194471
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