| Also known as | 40-156 |
| Diagram | Fig. 2 — CYLINDER AND CRANKSHAFT · ref 46 |
| Subsystem | engine top |
| Listed in parts books | 1969–1972 |
BSA Spring washer, rocker spindle
Spring washer used under the rocker spindle in the cylinder head.
This is a spring washer that fits under the rocker spindle in the cylinder head. It shows up in the catalog under the cylinder and crankshaft figures as well as the cylinder head and rocker gear figures, so it's part of the hardware that holds the rocker spindle in place at the top of the motor.
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The old book number for this one is 40-156, same part as 40-0156 in the current numbering. It's a small item but it does real work keeping the spindle assembly tight, so when you're in there for a valve job or a rocker rebuild it's worth checking the condition of the one you've got rather than reusing a tired washer out of habit.
Our catalog record ties this to appearances across several years of production but doesn't spell out a specific model. Confirm fitment against your parts book or give us a call before ordering.
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