Triumph and BSA Clutch Spring Steel Cup 57-1931 68-3287 42-3917
New clutch spring cup to suit Triumph and BSA motorcycles with 3 or 4 spring clutches including 250 350 500 650 750 singles & twins.
To fit 3 spring AND 4 spring clutch plate hubs. Correct fitment on many Triumph clutch hubs both unit and pre-unit. Also fits BSA A7, A10, A50 and A65 models.
Cup diameter: 3/4″ (19mm) Length: 1 3/8″ (35mm)
For clutch springs CLICK HERE
For clutch nuts CLICK HERE
The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.












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