Author Topic: BSA M33 Plunger - Engine Numbers?  (Read 269 times)

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Barrieh

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BSA M33 Plunger - Engine Numbers?
« on: 13 April, 2021, 17:10:34 »
The bike frame is 20 S 5341 which is a 1955 BSA M33 Plunger and the engine is a M33 OHV engine, but at some point its clearly had engine work. Perhaps a new engine or perhaps a new case... who knows.

C20  2   2102     5

The Middle 2 is much bigger than the rest and the 5 is about 1/2inch to the right of the 2102.

Any ideas around those numbers?

Hamish