Triumph BSA 500 650 750 Premium Late Unit Twin Clutch Thrust Washer 1970-83 PN# 57-3931 US T3931


Availability: In stock

SKU: 633726159709 Categories: , Tags: , OE Number: 57-3931Year: 1970-1983 Triumph twins. 1970-1972 BSA twins.Make: BSA TriumphModel: BSA A50 A65 A75 Triumph T100 TR6 TR7 T120 T140 Brands:

The clutch thrust washer is important as it serves as a buffer between the splined clutch hub and the clutch sprocket, or “clutch basket”. Clutch thrust washers are prone to wear and distortion of the inner diameter due to the forces they are subjected to.

This premium US-made thrust washer is constructed of durable brass and features a chamfer designed to enhance the fit against the shoulder on the clutch hub and minimize migration out of position once fitted. Suitable for fitment to the 1970-1983 Triumph twins and 1970-1972 BSA twins. The ID of the washer is 2.025″, the OD is 2.625″, and it is .052″ thick.

The thrust washer must be sufficiently thick to prevent the clutch hub from interfacing with the backside of the clutch sprocket. It is recommended to replace the original thrust washer if there is any doubt about its integrity. When fitted correctly, the chamfered side of the washer will face the the clutch hub.

The primary chaincase must be opened up, and the clutch assembly partially disassembled to access the clutch hub and thrust washer. Consult the workshop manual for more detailed instructions for this procedure.

Note the internal chamfer that faces towards the clutch hub center.

For those on a budget, we do also stock a less expensive UK made version of these click here

For clutch rollers  click here

For pre 1970 Triumph twin clutch thrust washers click here

Please note: Due the nature of the product, we unfortunately do not accept returns on bearings, thrust washers, service tools or electrical components. Please be confident about your purchase before ordering. If you have questions, please contact us.


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