| Diagram | Fig. 11 — FRAME · ref 54 |
| Subsystem | frame |
| Listed in parts books | 1969–1970 |
BSA Steering head cup
A steering head cup for the frame's steering bearing, seating the bearing race where the fork stem pivots.
66-4149 is a steering head cup, part of the bearing setup at the front of the frame where the fork stem passes through and pivots for steering. This cup is one half of the race that the steering head bearing rides in, cupped to seat the bearing and take the load transferred from the front end down into the frame.
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The catalog places this part squarely in the frame group, showing up in figures alongside footrests, battery carrier, and engine shield listings, which tells us it's cataloged as a frame component rather than a fork or wheel-bearing part. Our records show it appearing across catalog entries from 1969 to 1970, though we don't have anything more specific tying it to a particular model.
If you're rebuilding a steering head, it's worth checking the condition of both cups and the bearings themselves before putting things back together, since a pitted or worn cup will let the bearing move around in ways it shouldn't. Give us a call if you want to confirm this is the right cup for your frame before ordering.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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