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. 271 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. HIGH-PERFORMANCE PISTONS • Forged from a high-silicon aluminum alloy to deliver long life and consistent dimensions • Wiseco’s high-tech manufacturing ensures greater operating strength and lower expansion at high temperatures • Sold in kits that include two pistons, rings, piston pins and circlips • Include forged pistons with coated skirts, rings, retainer clips and chrome piston pins • Piston kits are available with Hastings-style X-Ring package (.062 top ring, .062 compression ring and .158 oil ring) NOTE: Replacement rings include rings for one piston only. DESCRIPTION PISTON KIT REPL. RINGS REPL. CIRCLIP (PR.) FOR 84-99 EVOLUTION BIG TWIN (1340cc) X-RING PACKAGE (10:1 COMP.) Std. K1665 3497X W5731 .005” K1675 - W5731 .010” K1666 3507X W5731 .020” K1667 3517X W5731 .030” K1668 - W5731 FOR 84-99 EVOLUTION BIG TWIN (1340cc) X-RING PACKAGE (8.5:1 COMP.) .010” K1641 3507X W5731 DESCRIPTION PISTON KIT REPL. RINGS REPL. CIRCLIP (PR.) FOR 84-99 EVOLUTION BIG TWIN (1340cc) X-RING PACKAGE (8.5:1 COMP.) (CONT) .020” K1642 3517X W5731 .030” - - W5731 FOR 78-84 BIG TWIN 1340cc 80” (9.5:1 COMP.) X-RING PACKAGE .030” - - W5731 FOR 72-85 XL 1000cc For all Wiseco pistons - - CW20 PISTON KITS • Replacement pistons available for stock and big-bore applications • All piston kits come with two pistons, rings, wrist pins, and wrist pin keepers • Compression ratios listed are approximate and are calculated using the correct-length cylinders as specified by S&S FOR 41-84 BIG TWIN PART # SIZE S&S # FORGED “HIGH COMPRESSION” PISTONS, FOR 74” STOCK MOTORS WITH 3.4375” BORE AND 3.9687” STROKE (9:1 C.R.); WRIST PIN DECK HEIGHT 1.436” 0910-1927 Std. 106-5503 0910-1928 .010 106-5504 0910-1930 .030 106-5506 FORGED “HIGH COMPRESSION” PISTONS, FOR 80” STOCK MOTORS WITH 3.500” BORE AND 4.250” STROKE (9.0:1 C.R.); WRIST PIN DECK HEIGHT 1.270” 0910-1935 .030 106-5522 FORGED PISTONS 3.625” BORE, 88” (7.5:1 C.R.), 93” (8.5:1 C.R.), 93” HC (9.1:1 C.R.), 98” (8.9:1 C.R.), MOTORS AND SIDEWINDER KITS; WRIST PIN DECK HEIGHT 1.260” 0910-1992 Std. 106-5535 0910-1993 .010 106-5536 0910-1994 .020 106-5537 PART # SIZE S&S # FORGED PISTONS 37/16” BORE, 84” (8.4:1 C.R.), 86” (9.4:1 C.R.), 88” (10.8:1 C.R.) (USE WITH S&S STROKER FLYWHEELS) 0910-4521 .050 106-5778 213123 .060 106-5779 213102 .070 106-5780 0910-4523 .080 106-5781 FORGED PISTONS 37/16” BORE, 84” (7.3:1 C.R.), 86” (8.0:1 C.R.), 88” (9.0:1 C.R.) (LOW COMPRESSION, USE WITH S&S STROKER FLYWHEELS) 0910-5263 .090 920-0091 K1675 0910-1992 0910-1927 • Require the use of connecting rods with a rod length of 7.440” (standard length OEM #24281-74A connecting rods); use of earlier connecting rods with a rod length of 7.470” (OEM #24281-41A) will result in a slight increase in the compression ratio of about one-halfpoint, and may also result in clearance problems (check all piston to cylinder head clearances carefully when using the early-style rods) • Made in the U.S.A.
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