Factory Service Bulletin for 1912-1926 Big Twin
| Year | Make | Model |
|---|---|---|
| 1912 | Harley-Davidson | F |
| 1913 | Harley-Davidson | F |
| 1914 | Harley-Davidson | F |
| 1915 | Harley-Davidson | F |
| 1916 | Harley-Davidson | F |
| 1917 | Harley-Davidson | F |
| 1918 | Harley-Davidson | F |
| 1919 | Harley-Davidson | F |
| 1920 | Harley-Davidson | J |
| 1921 | Harley-Davidson | J |
| 1922 | Harley-Davidson | J |
| 1923 | Harley-Davidson | J |
| 1924 | Harley-Davidson | J |
| 1925 | Harley-Davidson | J |
| 1926 | Harley-Davidson | J |
Fitment details provided by supplier.
