S&S complete Engines for Sportsters and Buells are available in 100CI" (1640 cc). The 100CI engine has 4" stroke with a 4" bore. Cylinder length is .260" taller than stock. The 100CI engine will generally fit in stock Sportster frames with no modification, but due to the increased cylinder length, requires the S&S billet motor mount to fit in the Buell chassis. Exhaust modifications may also be required to gain frame clearance when installing a 100CI engine in a Buell frame. Compression ratio of the 100" engine is 10.3:1. Crankcases have 1986-1990 four-speed style cam geometry, 1991 to present five-speed style driveside, and are available only assembled by S&S technicians in natural aluminum finish. You need a 1991 to present style 5-speed transmission, clutch, primary components, charging system and ignition to complete these engines. Installation of a 100CI Buell style engine in a Buell frame also requires the purchase of a ZPN750502 billet motor mount.

S&S Sportster and Buell engines include:

•S&S Special Application Sportster or Buell style crankcases
•Complete S&S flywheel assembly
•S&S Super Stock cylinder heads
•S&S cylinders and pistons
•S&S 555 camshaft set and required gear case components
•Adjustable pushrods and pushrod cover assemblies
•S&S billet tappet guides with hydraulic tappets
•Super G carburetor kit
•S&S gear billet XL style cover kit
•S&S billet aluminum rocker covers and roller rocker arms
•Oil pump
•1986-1987 style bolt-on oil filter mount


S&S complete engine for Sportster
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100 CI Natural aluminum finish
S&S complete engines for Buell
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Optional billet motor mount for use with 100 CI engine in Buell frame

Recommended Retail Prices include 25% sales tax.

Prices exclude shipping, import duties and installation.

Prices are based on EUR to SEK interbank rates obtained daily. The interbank rate is the rate that banks trade currency to each other. These prices must be used as a guide.