1926-1984 Vintage Models - S&S Cycle

S e ction 5:Flathead Power ® by S&S ®Parts forTwin Cam 96 /103 2007-2012Parts forTwin Cam 88 ®1999-2006Cylinders and pistonsFor 1936-’47 OHV Big TwinsThese cylinders for knuckles and Flathead Power KN-Series engines are made of thesame engineering-grade grey cast iron that we have used for years in our cylinders forshovel engines. As a result, these cylinders have very high tensile strength and excellentwear resistance. Cylinders are available unfinished and with a durable black powdercoatfinish. Available in 37/16" and 35/8" bore. Different length cylinders are also available.1926-1984 Vintage ModelsParts forEvolution ®1984-1999Parts forSportster ® & Buell ®1986-2012Parts forVintage Engines1926-1984Parts forX-Wedge®2007-2012Parts forVictory®, Off-road& MetricPERFORMANCEPARTSFitment• 1936-’47, 74"and 93" knuckle engines• Flathead Power KN-Series enginesFeatures and benefits• High strength engineering-grade grey cast iron• Excellent wear resistance• Durable powdercoat finish – high temp gloss blackOptions• 37/16" or 35/8" bore size• Available in sets or single front or rear cylinders• Available fit with your choice of S&S pistonsS&S offers machine shop services through the S&S remanufacturing program. Newpistons can be fit to your existing cylinders for a reasonable charge.Displacement Stroke BoreTypical Cylinder Dimensions For 1936-’47 OHV EnginesAnd Flathead Power KN-Series EnginesModel YearDisplacement37/16" & 35/8" bore cylinders for 1936-’47 OHV EnginesCylinder OnlyHigh Temp Gloss BlackFrontRearCylinderLengthCylinderBoreCylinderLengthNotes1941-’47 74" 37/16" 5.530" No Fire RingKN-Series 93" 35/8" 5.625" No Fire RingSpecial – 37/16" or 35/8" Specify You Tell Us!*Cylinders for 61" knuckle engines are not available from Flathead Power®Cylinders for stock 74" knuckle engines and Flathead Power KN-Series engines do not have a firering on the head end of the cylinder.Cylinders Only (Set)High Temp Gloss BlackSpecial Order74" 331⁄32" 37⁄16" 5.530" 106-4513106-4514106-4512(H-D® #16483-41)(H-D® #16492-41)(H-D® #16483-41, 16492-41)106-4892*93" 41⁄2" 35⁄8" 5.625" 106-4660 106-4661 106-4655Cylinder set include cylinders, head gaskets, and base gaskets.*Special Order: Download the Special Order Form at sscycle.com/soformsRacingProductsTools & ShopSuppliesDealer Services& Promo ItemsWarranty &Company PolicyOEM Cross ReferenceAppendix & Index37/16" & 35/8" bore cylinders WITH PISTONS for 1936-’47 OHV EnginesPiston Series Displacement Stroke Bore Cylinder LengthCompressionRatioCylinders w/ Pistons – Black Recommended Piston FitFHP 74 LC Forged 74" 331⁄32" 37⁄16" 5.530" 8:1 106-4519 Close: .0035"-.0040"FHP 35/8" Forged 93" 41⁄2" 35⁄8" 5.625" 8.2:1 106-2402Loose: .0045"-.0055"Special Order* 106-4892*Cylinders with pistons include cylinders, piston kit, head bolts, base nuts, and head & base gaskets. All piston kits include rings, wristpins, and clips.*Special Order: Download the Special Order Form at sscycle.com/soformsBase GasketsEngine Year Bore Thickness Material Each 2 pack 10 packPan/Knuckle* Front35/8" .018" Composite93-1023-S1936-’65(H-D® #16776-63)– 93-1070Pan/Knuckle* Rear 35/8" .018" Composite 93-1022-S – 93-106935/8" .020" Composite 106-2690 – –KN-Series 1936-’4735/16" .020" Composite106-2692(H-D® #16774-21)106-4919 –NOTE: Flathead Power cylinder heads for 1940-’47 OHV big twins are machined for 7/16-20 head bolts and are not compatible with stock 7/16-16 head bolts. If using FHP heads with 37/16" borecylinders, stock style hex head bolts for 1948-’65 big twins, part #106-4523 may be used. Flathead Power 35/8" bore cylinders require the use of FHP 1966-'84 style 12 point head bolts part #93-3024, due to clearance issues.Stock 1930-’78 hex style base nut kit is available in cadmium plate, part #106-4522, for 37/16" bore cylinders only. Stainless raised hex base nuts, part #93-3063-S, are required for 35/8" bore cylinders.5-44Order toll free 866-244-2673