Twisted Choppers Transmission Mounting Plate for Harley Big Twin 5/6 Speed
Twisted Choppers Transmission Mounting Plates give custom frame builders a precision-machined, ready-to-weld solution for locating Harley-Davidson Big Twin 5 and 6-speed Softail-style transmissions in a custom frame, no critical alignment guesswork, coped to sit against the seat post, and machined for proper flange nut recesses.
Key Features
- Coped to fit 1-5/8-inch seat post tubing, ready for welding without additional prep
- Machined for clearance with recessed pockets for flange nuts
- Available in three offsets (.000″, .750″, 1.500″) to match rear tire width requirements
- 1/2-inch steel plate construction
- Made in the USA
Technical Specifications
- Material
- 1/2-inch steel plate
- Seat post tube clearance
- Coped for 1-5/8-inch tubing
- Available offsets
- .000″, .750″, 1.500″
- .000″ Offset
- Right-side drive applications, 280mm and larger rear tires
- .750″ Offset
- 180mm and 200mm rear tires
- 1.500″ Offset
- 240mm and 250mm rear tires
- Origin
- Made in USA
Fitment Notes
- Designed for custom frames using 5 or 6-speed Harley-Davidson style Softail transmissions
- Select offset based on intended rear tire width using the SKU before ordering
- Review the Fitment tab for dimensional compatibility details







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