The home of Vintage and Classic Motorcycles.....

Many thanks to Johnny Sells for identifying this bike for me. The two-tube muffler was used on the 1930 - 45" twin and the 1932 to 1934 - 21" singles. The horn is part no. 4809-31, introduced in 1931 and used on all 1931 to 1939 models (previous models used the Klaxon 11 projector horn that was mounted on the front forks under the head lamp). The carburetor is a side-bowl Schebler (part no. 1227-26) used on the 1926 to 1934 A & B singles). The gas tank (used on the 1932 to 1934 - 21" singles) is taller than those used on the 1926 to 1930 21" singles. So, based on these amazingly detailed observations, he has narrowed it down to 1932 and 1934.