| Also known as | W3987 |
| Diagram | Fig. 18 — FRONT WHEEL · ref 26 |
| Subsystem | wheels |
| Listed in parts books | 1971–1973 |
TLS FRONT BRAKE LEVER,1971-2 (Standard length 1.5)
Standard-length (1.5 in.) front brake lever for the TLS front drum brake, cataloged for 1971-72 Triumphs.
37-3987 is the front brake lever for the twin leading shoe (TLS) front brake setup, cataloged for 1971-72. It's the arm that the brake cable pulls on at the brake plate to actuate the shoes inside the drum. This one is listed as standard length, 1.5 inches, which is the spec to check against what's on your bike now before you order.
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On the older letter-prefix system this part shows up as W3987, so if your parts book or an old invoice references that number, it's the same physical lever under the current 37-3987 designation.
The catalog record ties this specifically to the TLS front brake, so if your bike has a single leading shoe front drum this isn't the right lever. Confirm which brake plate you're running before ordering.
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