If you want to increase the engine size of your 883/1200 Harley Sportster or Buell engine, Zipper’s has developed 3-13/16” bore aluminum alloy cylinders to ley you go to 88″ while still keeping the stock stroke crankshaft. Cylinders are manufactured with high quality cast-in iron liners and will work in all types of performance applications. Includes design improvements for structural integrity, plus cooling fins have been increased to improve heat transfer.
Un-honed cylinders can be fitted with your choice of several piston designs to accommodate specific usages, a service that Zipper’s can provide. (Order pistons, head and base gaskets separately. Multiple thickness base gaskets are available to allow the engine builder to set piston-to-head squish. (3-13/16” is the largest bore size that the stock H-D® XL cases can be safely bored for. 3-5/8” bore is the maximum S&S replacement XL/Buell cases can be bored for.) You can view and downloard a Dyno Chart by clicking HERE. More info at: Zipper’s Performance Products.