Full width Baker ground gears finished by diamond cut tooling Helical 4th, 5th, and 6th gears for silent operation Fixed spindle shift drum for smooth, low inertia, drum indexing Chrome trap door with engraved DD6 logo Anti-overshift ratchet pawl included Compensating sprocket yields 14% more starter system torque Longer primary chain included Includes one quart of Spectro transmission fluid