The S&S master flywheel balancing kit for 1984-1999 Harley-Davidson big twin and 1986-Up Sportster models is designed to allow the average shop to rebalance stock and S&S flywheels accurately and quickly. Whether doing a stock rebuild or a performance upgrade using aftermarket parts, flywheel rebalancing is a desirable step in the engine building process. A complete set of detailed instructions is furnished with each kit for flywheels with tapered crankpins only. Balance scales included. S&S Part #: 53-0027