These sprockets convert 45" engines to use a Big Twin doublerow primary chain with our ‘Project 45’ frames. Install a 4-speed Big Twin transmission into the frame using the included mounting plate.... aligns perfectly with 1936–1964 OEM mainshafts.

45SPK20 20-tooth
45SPK22 22-tooth
45SPK24 24-tooth

  • 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 info@paughco.com 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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