
Centerline Adjustable Aluminum Transmission Plate - Harley-Davidson Big Twin 4 Speeds
Struggling to get your primary and final drive perfectly aligned with that old, clumsy transmission plate? The Old-Stf Centerline adjustable transmission plate solves this by using an innovative push-pull system for even, straight adjustments, eliminating the risk of twisting your transmission.
- Precision Alignment: Features an easy-to-use centerline pull & push adjustment bolt that allows for an even, straight, and precise alignment, eliminating the old offset adjuster that can twist your transmission or break.
- Expanded Adjustment Range: Offers 3/8" of additional adjustment over the stock plate, providing the extra room needed for unique primary or big belt drive setups.
- Broad Compatibility: Fits 1936-1986 Big Twin 4-speed transmissions, including aftermarket 6-speed-in-a-4-case units. It is designed for both early and late Big Twin frames from 1936-1984 and most aftermarket frames.
- Lightweight & Strong: Machined from 6061-T6 Aluminum, this plate weighs only 1lb 6oz, making it 2lbs lighter than the stock plate. It measures 9.125" x 4" x .495".
- Versatile Mounting Ear: An integrated accessory mounting ear can be used for securing your fender, brake line switch, oil filter, or other components.
- Made in the USA: Proudly manufactured in the United States, ensuring high-quality craftsmanship.
Fitment Notes:
+.125" forward, +.250" back additional adjustment is subject to frame clearance.
Most aftermarket frames have a oem style rear plate mount, However a garage built hardtail frame may have a solid one piece rear mount that will not work with this plate. A minimum rear underside clearance of 1/4" (6.35mm) is required for fitment
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Struggling to get your primary and final drive perfectly aligned with that old, clumsy transmission plate? The Old-Stf Centerline adjustable transmission plate solves this by using an innovative push-pull system for even, straight adjustments, eliminating the risk of twisting your transmission.
- Precision Alignment: Features an easy-to-use centerline pull & push adjustment bolt that allows for an even, straight, and precise alignment, eliminating the old offset adjuster that can twist your transmission or break.
- Expanded Adjustment Range: Offers 3/8" of additional adjustment over the stock plate, providing the extra room needed for unique primary or big belt drive setups.
- Broad Compatibility: Fits 1936-1986 Big Twin 4-speed transmissions, including aftermarket 6-speed-in-a-4-case units. It is designed for both early and late Big Twin frames from 1936-1984 and most aftermarket frames.
- Lightweight & Strong: Machined from 6061-T6 Aluminum, this plate weighs only 1lb 6oz, making it 2lbs lighter than the stock plate. It measures 9.125" x 4" x .495".
- Versatile Mounting Ear: An integrated accessory mounting ear can be used for securing your fender, brake line switch, oil filter, or other components.
- Made in the USA: Proudly manufactured in the United States, ensuring high-quality craftsmanship.
Fitment Notes:
+.125" forward, +.250" back additional adjustment is subject to frame clearance.
Most aftermarket frames have a oem style rear plate mount, However a garage built hardtail frame may have a solid one piece rear mount that will not work with this plate. A minimum rear underside clearance of 1/4" (6.35mm) is required for fitment





















