M8 models are equipped with the 'early style' steel flanges again

73-03 XL Sportster

apart from the fork tubes and oil

USA manufactured from billet aluminum with High Flow 2" chromoly gerotor gears

KB PERFORMANCE, 3-5/8" BIG BORE PISTON KIT. STD Packningar Twin Cam M8 models are equipped with3 5 8" big bore piston set. Used with 3 5 8" big bore cylinders with 5. 330" (stock) to 5. 530" (+. 200") length. Use with 4 1 4" stock stroke (88"), 4 1 2" (93"), 4 5 8" (96") to 4 3 4" (98") stroker flywheels. 10. 0: 1 CR. Piston weight 385gr. Piston pin weight 97gr. Head type: Dome Dome 57cc. Compression height 1. 285" Bore 3. 625" (3 5 8"). Stroke 4. 250" to 4. 750" (4 1 4" to 4 3 4"). Rod length 7. 440" Cyl. length 5. 330" (Std) to 5. 530" (+.