| Also known as | 40-158 |
| Diagram | Fig. 2 — CYLINDER AND CRANKSHAFT · ref 12 |
| Subsystem | engine top |
| Listed in parts books | 1969–1972 |
BSA Thrust washer, rocker spindle (1/2" I/D)
A 1/2 inch I.D. thrust washer for the rocker spindle in the cylinder head rocker gear.
This is a thrust washer that fits over the rocker spindle in the cylinder head, sized for a 1/2 inch inside diameter. It sits in the rocker gear assembly and takes up end play on the spindle, keeping the rocker arm located side to side as it pivots.
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The catalog lists it under the cylinder and crankshaft, cylinder head, and cylinder head rocker figures, so it's part of the top-end rocker gear rather than anything down in the bottom end. Our appearances for this number run across catalog years 1969 through 1972, but we don't have a specific model tied to it in our records.
If you're rebuilding a rocker box and need to know exactly which machine this washer belongs to, give the shop a call and we'll help confirm fitment before you order. It's a small part but the right one matters for keeping the rocker running true on its spindle.
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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