Sturmey-Archer vintage motorcycle gearbox information. Data includes gearbox numbers cross-referenced to approximate years. I say “approximate” as half a year is as close as I can get with the information available.
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Sturmey Archer types of gearbox.
In order to easily use this Sturmey-Archer vintage motorcycle gearbox information, you need to look for numbers and letters on the outside of the gearbox. They are usually on the top and close to the outside edge. The cases should have a number stamp, together with two letters as shown below.
CS Gearbox 3 speed medium weight
LS Gearbox 3 speed prefixes LW or HW (Types III and IV ¾ speeds improved LS type no data)
TS Gearbox 2 speed lightweight
BS Gearbox 3 speed light weight
FW gearbox 3 speed improved
BW gearbox 3 speed medium weight
MA Gearbox modified LS type special to Raleigh
Approximate dating Sturmey Archer vintage and veteran motorcycle gearbox numbers by year.
Following, is a guide to the main types of SA transmissions. Use the stamped numbers on the outside of the cases to help with Sturmey-Archer vintage motorcycle gearbox information. The first letters are the type of gearbox.
CS Gearbox 3 speed medium weight
| Year | Gearbox type | stamped numbers |
|---|---|---|
| 1913 to 1917 | CS | Not enough data |
| 1918 | CS | 20000 |
| 1919 | CS | 30000 |
| 1920 | CS | 40000 |
| 1921 | CS | 50000 |
| 1922 | CS | 70000 |
| 1923 | CS | 80000 |
| 1924 | CS | 84000 |
| 1925 | CS | 87000 |
| 1926 | CS | 90000 |
| 1927 | CS | 94000 |
| 1928 | CS | 96000 |
| 1929 | CS | 105000 |
| 1930 | CS | around 106000 |
LS Gearbox 3 speed prefixes LW or HW
| Year | Gearbox type | stamped numbers |
|---|---|---|
| 1922 | LS | 4000 |
| 1923 | LS | 16000 |
| 1924 | LS | 40000 |
| 1925 | LS | 60000 |
| 1926 | LS | 90000 |
| 1927 | LS | 110000 |
| 1928 | LS | 150000 |
| 1929 | LS | 160000 |
| 1930 | LS | 170000 |
TS Gearbox 2 speed lightweight
| Year | Gearbox type | stamped numbers |
|---|---|---|
| 1920 | TS | 1000 |
| 1921 | TS | 12000 |
| 1922 | TS | 16000 |
| 1923 | TS | 20000 |
BS Gearbox 3 speed light weight
| Year | Gearbox type | stamped numbers |
|---|---|---|
| 1924 | BS | 8000 |
| 1925 | BS | 23000 |
| 1926 | BS | 28000 |
| 1927 | BS | 38000 |
| 1928 | BS | 44000 |
| 1929 | BS | 50000 |
| 1930 | BS | 60000 |
MA Gearbox modified LS type special to Raleigh
| Year | Gearbox type | stamped numbers |
|---|---|---|
| 1927 | MA | 1000 |
| 1928 | MA | 4000 |
| 1929 | MA | 8000 |
| 1930 | MA | 12000 |
| 1931 | MA | 14000 |
| 1932 | MA | ? |
If you are looking for a particular type of Sturmey Archer transmission, please use the tables above for Sturmey-Archer vintage motorcycle gearbox information. This will help in your search for the correct gearbox for your vintage or veteran motorcycle.
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