S&S provides high quality 1986-1987 style pinion Sportster pinion gears for use with the S&S Evolution style pinion shafts used in S&S flywheel assemblies. These are the splined style pinion shafts as S&S does not produce the 1988-1990 style keyed pinion shaft for Evolution style Sportster engines. S&S feels the keyed design is not as strong, and that the splined pinion shafts are preferable for high performance applications. Also fit stock 1986-1987 flywheels.
