The N1 Shift Drums have a 0-down all-up shifting pattern and eliminate any possibility of catching neutral on aggressive 1-2 shifts. Neutral is below 1st. The N1 drum is also popular with hand shifting bikes where finding neutral without doubt or error is critical to safety or riding/looking smooth.

Bought this for my Baker OD6 in my 03 fatboy only to discover it has a bad gear so it’s still NIB.
This is the complete kit from Baker N171-6 comes with a drum, 6061-T6 pillow blocks, and a torsion-spring loaded detent system.
Decided to go with a Jim’s Fat 5. $300 Price includes shipping to lower 48.