Large 4" diameter for a bold

Multi-compound 3-zone at rear for optimizing area of contact

6cm) pullback

excluding copper inserts

Traditional Sportster King style tank with a low tunnel

s s 132 big bore kit for harley milwaukee eight 15OM Large 4" diameter for aS&S 114" to 132" Big Bore Piston & Cylinder Kit for Harley Davidson Milwaukee Eight S&S has been building big bore kits for Harleys since the 1960s and has it down to an absolute science. Their latest efforts are aimed at the Milwaukee Eight platform (2017 and newer HD big twins) and open up a whole new level of performance for these bikes. This kit converts the 114" engine to 132" which is the largest possible 4. 320" bore bolt in big bore kit on the