Black Derby, Inspection And Outer Primary Covers

Use in stock replacement applications on 45" models and Big Twins.


B757 Fits 1936–1964 Big Twins (OEM 60555-36)


B758 Fits 1936–1964 Big Twins (OEM 60572-36)
B758A Fits Paughco #’s B770 and B770A for 45" primary covers (OEM 60569-29)


B750 Fits 1936–1954 4-speed Big Twins without compensating sprockets (OEM 60505-36)
B751 Fits 1955–1964 4-speed Big Twins with compensating sprockets. Fits 1936–1954 models if a Paughco #B752 inner primary cover is used (OEM 60505-55)
B770 Custom style for 45" two or three wheelers with kickstart
B770A Stock style for 45" two or three wheelers with kickstart (derby cover attached to primary and two inspection holes) OEM 60504-32

  • Items in stock will be dispatched within 2 business days. Once shipped, you will receive an order confirmation email with a tracking number.

    For items *built to order, shipping times may vary. To inquire about specific shipping times for custom orders or for products you are interested in, please contact us at or call 1-800-426-2621.

    *Built-to-order items include Frames, Springers, Gas Tanks, Oil Tanks, Trike Products, and any product currently out of stock. If an item you've ordered is on backorder, you will be notified within 2 business days of placing your order.

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