Project, BSA B40 Frame with clear frame numbers & letters under masking tape matching the v5 also has a dateless number for sale via sensible offers. Unfortunately the frame has slight bends in down and top tube presumably from a bump a long time ago has not affected the removal/fitting of the engine unit. The frame could be straightened (jigged) or used as it has been for years the motorcycle was last on the road with mot & a c15 engine fitted in 2018 contact for details