& Frame A50 Royal Star A50RC-101 A65 Thunderbolt A65TC-101 A65 Lightning A65LC-101 A65 Firebird A65FC-101 Models 1969 On The engine number is located on the left side of the engine, immediately below the cylinder barrel flange. The number is stamped onto a raised pad. The frame number is located for BSA's 1969 and earlier on the left side of the frame, on the front engine mounting lug. BSA's 1971 and later, either side of the frame on the stearing head to frame gusset, note that these don't always have the model stamped. On'71 up, 250-500 single oil in frame bikes, the number is located on the kickstand lug or steering head area on late bikes. The Number consists of 4 sections. Инструкция К Оверлоку Brother 1034d.

Up until 1968 it is rare for the engine and frame number to be identical and where the frame is shared by several models the codes start with the smallest model e.g. All A series models have A7 or A50 prefixes with the exception of the Rocket Gold Star and Super Flash. On most BSA's the frame number is located in the. Vintage BSA Motorcycle Engine & Frame Serial Numbers Decoding.