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Engines Complete Custom

Engines Complete Custom

S&S KN-Series Engines
S&S KN-Series Engines
Knucklehead - the name describes a true legend and this engine design is without a doubt one of the important milestones in the history of Harley-Davidson. Introduced in the year 1936 the ohv-engined models in short time became synonyms for sporting, fast and reliable touring machines. Economically this layout proved to be a huge success for the Motor Company, too, because brand followers - and many others - quickly realized the outstanding qualities of this motorcycle. Design and technology of the Knucklehead turned out to be supremely sound and it became the prototype of all Milwaukee Big Twins, which significantly influenced all successive model groups down to the present day. The KN-Series engines by S&S closely resemble the appearance of a stock Knucklehead engine. However, numerous reforms enhance power, engine life, and reliability. The main improvement in design is the 1958-65 style flywheel assembly, which uses a splined sprocket shaft and a Timken sprocket shaft bearing on the drive side. This increased flywheel stability and strenght became necessary to handle the significantly increased power development. The rocker arm cover “tins” are another modern improvement. They are made from 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 positive seal, and is much easier to service if needed, since the valve guides do not have to be pressed.
The selection includes 74” (1200 cc) and 93” (1560 cc) engines with crankcases for early style chassis thru 1947, with 1955-64 tin primary and 1936-64 transmissions.
S&S KN-Series engines come completely assembled and ready to run with a electronic S&S Super Stock ignition system and Super E carburetor.
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S&S SH93-Series Shovelhead Style Engines
S&S SH93-Series Shovelhead Style Engines
The legend lives! For die-hard Shovelhead enthusiasts we offer these complete, ready-to-install Long Block engines, assembled by S&S builders with the finest parts on the market today. Start with the bullet proof crankcases, flywheels, cylinders, and heads which proved their performance since so many years, and finish with the latest premium valve train components. Crankcases and cylinder heads come with natural aluminum finish, the cast iron cylinders are black powdercoated. Billet gear cover, tappet guides, and rocker boxes look outstanding and offer the kind of performance you expect from an industry leader like S&S.
What you can’t see inside the engine is just as impressive. The S&S Shovelhead style tappet guides are designed around the quiet, dependable Evolution style tappets. The corrected tappet guide bore geometry assures correct valve timing with carefully selected S&S Evolution style camshafts installed in the gearcase. The unique adjustable Quickee pushrods are collapsible for easy removal and installation, but are stronger than stock style pushrods. Inside the billet rocker covers are S&S’s exclusive forged roller rocker arms. Top end oiling is provided through the pushrods which makes external oil lines obsolete. To let them breathe deeply all S&S Shovelhead engines are supplied with a Super E carburetor because tests showed that it provides the best performance on the street.
Last but not least S&S SH engines are equipped with S&S Super Stock ignition systems. All these features result in Shovelhead engines with the kind of quiet power that some folks may just have a hard time believing.
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