Natural crankcases and black powder-coated cylinders and heads. Allows the use of modern primary, transmission, clutch components and electrical system. S&S Super Stock™ single-fire ignition system and polished billet timer protect engine with a three-step break-in rev-limiter for first 24 hours of operation. S&S Super E carb. Correct length sprocket shaft for 1970-up primary and transmission. Natural crankcases and black powdercoated cylinders and heads. Includes oil filter mount at generator location. S&S Super Stock™ single fire ignition system and polished billet timer protect engine with a three-step break-in rev-limiter for first 24-hours of operation. Made in the U.S.A.. S&S Super E carb. Correct length sprocket shaft for 1970-up primary and transmission. Allows the use of modern primary, transmission, clutch components and electrical system. Includes oil filter mount at generator location. 93" displacement, 8.2:1 compression, 4-1/2" stroke, 3-5/8" bore.