These direct drive motor sprockets eliminate the diaphragm spring style compensator assembly, preventing noise and slippage in high-performance applications. They also eliminate the issues of failure-prone stock- or Screamin` Eagle compensating sprockets and improve starting. Sprockets are considerably lighter than the stock compensator assembly, reducing the rotating mass. Made out of heat treated high strength tool steel with a black oxide coating. The 34 tooth version duplicates the stock drive ratio, whereas the 32 tooth version increases acceleration by 6%. Come complete with detailed installation instructions. The 32 tooth version also includes a special tensioner shoe to allow the use of the stock length primary chain.