This is a dust cap that fits on the push rod bar at the bridge between the clutch hosing and primary drive. Its purpose is to stop grit and dirt entering the housing and allows the rod to keep lubricated and moving freely.
BSA BANTAM Clutch Pushrod Rubber Dust Cap
BSA BANTAM Clutch Pushrod Dust Cap D7
3 X BSA BANTAM CLUTCH PLATE (90-1318)
BSA Bantam Clutch Plate Cover Screws (set of 3) D1 D3 D5 D7 D10 D14 90-0368
BSA Bantam Kickstart Lever Small Spline Fixed BSA Bantam D1/D3/D5/D7/D10/D14
BSA D1 D3 D5 D7 D10 D14 Bantam clutch plates