Speedo Seats & Luggage- racks Frame Chassis Suspension Forktubes Wheels Brake Fenders Gastanks Motorparts Gaskets Intake Transmission & Driveline Exhaust Electrical & Lights Handlebars, Cables & Mirrors Oil tanks Oil & Chemicals Fasteners Windshields Forward controls, Footpegs Miscellaneous MOTOR PARTS - LOWER END 10 580 NEW PRODUCTS ADDED WEEKLY AT / MOTORCYCLESTOREHOUSE.COM KNUCKLEHEAD CARBURETOR 531588 S&S, KNUCKLEHEAD COMPLETE ENGINES The S&S KN-series (Knucklehead) engines come very close to the original but it is not a replica engine. A a number of improvements/changes were made. It comes with 48-99 engine mounts and will not fit OEM Knuckle frames. A later, 58-65, style flywheel assembly is used, with the splined sprocket shaft and a Timken sprocket shaft bearing for increased strength. Therefore a 5465 style tin primary and motorsprocket must be used. Rocker arm cover 'tins' are also improved over stock. The lower covers are made of die-cast aluminum, and instead of being held in place by the valve guide, they are held down by valve spring pressure. A special gasket on the bottom of the lower 'tin' provides a good seal and easier access for servicing, since the valve guides do not need to be pressed out in order to remove the lower covers. Instead of the steel brazed-in hard oil return lines used on stock tins, S&S has improved oil line design for better reliability, access and assembly. The KN-Kone engine is identical but comes with an alternator crankcase which is adaptable with all 70-99 Shovel & Evo B.T. transmissions and aluminum primary covers. Engines come completely assembled and ready to run with an S&S pre-set Superstock single fire ignition system and S&S Super E carburetor. Note: Crankcases come with 48-99 engine mounts and will not fit OEM Knuckle frames. 93" Knuckle. 3-5/8" x 4-1/2" stroke With FHP420 cam & 8.2 compression ratio. 531588 KN. Generator style 531589 KN-Kone. Alternator / generator style S&S - BIG TWIN CASES S&S, 36-99 BIG TWIN CRANKCASES S&S Superstock™ crankcases, made from 356-T6 aluminum, are much stronger than the OEM case. OEM cases can/may break in high performance or even stock applications, like more than a few of us found out the hard way. These S&S Superstock™ cases can be used for both stock replacement and racing applications. Important to the engine builder are the substantial savings in labor when using S&S cases. These cases come 'set up' with sprocket shaft Timken main bearing races and cam needle bearings installed and pinion shaft main bearing race pressed in and line-honed. Additional parts that are supplied include Timken sprocket shaft bearings, cylinder studs, nickel plated case bolts, crankcase fittings, oil pressure sensor, timing & magnetic crankcase drain plugs and a special S&S design alternator stator plug clamp screw. The flywheel scrapers are machined to match the original 8-1/2" diameter flywheels. Some stroker kits require 8-1/4" small diameter flywheels, for which special cases are required. S&S cases maximize crankcase oil scavenging efficiency by using a 'ported' design breather passageway. The 36-69 S&S oil pump (MCS 519922) can be used with all 36-69 S&S crankcases. The aluminum H-D oil pump, (26190-73) or the S&S oil pump, MCS 519923, can be used in 70-91 applications. For 92-99 crankcases a 92-99 OEM (26053-92) or S&S (MCS 519924) oil pump must be used. S&S cases are clearanced up to and including 5", no additional clearancing for strokers will be necessary. S&S cases come complete with assembly instructions. Note 1: S&S generator and alternator/generator combination cases (used with S&S 36-69 style pump, available as MCS 519922) are available on Special Order base. Note 2: Crankcases for 36-54 Knuckle and Panhead models will not take OEM flywheels, pinion or sprocket shaft since late style (1955-up) Timken bearings are used in all S&S cases. 55-up shafts will not fit 36-54 OEM flywheels, S&S does not recommend machining 36-54 flywheels to take 55-up shafts. For all 36-55 B.T. applications 58-81 (MCS 512404) pinion & 55-64 (MCS 512401) splined sprocket shafts can be used with S&S flywheels, which all have a 6° shaft taper with keyway. Natural Black -- -- 36-47 Knuckle, stock bore 512327 -- 36-47 Knuckle, 3-5/8" bore 512348 -- 48-64 Panhead (steel prim.), stock bore -- -- 48-64 Panhead (steel prim.), 3-5/8" big bore 512329 -- 65-69 Early Shovel/Pan (alu prim.), stock bore 512343 -- 70-84 Shovel, stock bore Natural Black 512342 -- 70-84 Shovel, 3-5/8 big bore -- -- 70-84 Shovel, 3-5/8 big bore, Small Diameter flywheels 512341 531037 84-91 Evo B.T., stock bore* 512344 -- 84-91 Evo B.T., 3-5/8 big bore* 512347 512375 92-99 Evo B.T., stock bore (excl. Twin Cam) -- 531038 92-99 Evo B.T., 3-5/8 big bore (excl. Twin Cam) *For 84-E85 Evo Big Twin models you must use a L85-91 style cylinder head bolt kit. These can be ordered separately as MCS 505266 (Gardner-Westcott) or 989599 (Colony) in standard lengths only. 512344
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