| Diagram | Fig. 3 — CYLINDER BARREL, EXHAUST PIPES, VALVES · ref 23 |
| Subsystem | bodywork |
| Listed in parts books | 1968–1971 |
BSA Spring washer — heat shield, rear fixing (·255" × ·500" × ·048")
A small spring washer (.255" x .500" x .048") used at the rear fixing of a heat shield.
82-9020 is a spring washer used at the rear fixing point of a heat shield, sized .255" x .500" x .048". It's a small item but it does a real job — spring washers like this keep tension on a fastener so it doesn't work loose from vibration, which matters on a fitting that sits close to the exhaust and takes heat cycling every ride.
Read more
This one shows up across a wide spread of figures in the parts books — cylinder barrel and exhaust pipe sections, oil tank and silencer sections, mudguard sections, even electrical equipment plates — which tells you it's a generic fastener the factory used in more than one spot rather than a single dedicated part. Appearing in that many figures over 1969 to 1971 catalog listings means it was a common small-parts item on the bikes of that era.
If you're chasing one of these down for a heat shield rear fixing, check the dimensions against what's actually on your bike before ordering, since this washer size clearly got used in multiple locations rather than just one.
Sorry if we got something wrong here. If you think this information isn't correct, .