BRAND NEW PART # 910-0733 128″ BIG BORE KIT FOR M-EIGHT 114″ AND 117″ ENGINES The Big Bore kit yields excellent results with stock cylinder heads. Bolt-on kit, the largest cylinder bore possible without requiring machining of the crankcases. Easy installation: no need to bore or split existing cases, just swap the cylinders (unless otherwise noted) Cylinders are constructed from premium aluminum castings with cast-in iron liners, and feature black granite finish with highlighted cylinder fins Kits include cylinders, pistons, rings and gaskets (head, base and exhaust) This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications. BASE COLOR BLACK COLOR/FINISH HIGHLIGHTED FINS / BLACK GRANITE BORE SIZE 4.250″ DISPLACEMENT 128″ STROKE LENGTH 4-1/2″ COMPRESSION RATIO 11.0:1