Modern drivetrain kits with a retro look. Custom Chrome® has taken the guesswork out of the parts needed for a complete drivetrain kit for Softail® models, and made it more reliable and user friendly at the same time. These new drivetrain kits now include our latest RevTech® engines and 6-speed transmissions, and an updated RevTech® chain drive primary kit. This primary kit contains a 66-tooth ring gear with a 9-tooth starter pinion gear to increased starter motor torque, while maintaining a higher primary ratio using a 25-tooth compensator sprocket and a 36-tooth clutch shell sprocket for easier starting. We have also included RevTech® Kevlar® clutches, polished or black powder-coated high-torque starters, jackshaft, heavy duty alternator rotor, stator, all mounting hardware, seals, bushings and gaskets (rectifier/regulator not included).