BSA Pre-Unit Primary Cover Gasket 42-7507 (1) Alloy Often times its Missing from

Often times its Missing from the "Barn Find" Engine

Transfers are often confused with water-slides or varnish transfers

Did your air box rubber grommets break

Style Tool Roll Bag and simply keep it in your Tool Box or under your Seat

6 1/2" headlight or a 7" headlight unit

BSA Pre-Unit Primary Cover Gasket 42-7507 (1) Alloy Often times its Missing fromNew English Made BSA Pre Unit Singles & Twins Primary Gasket. Stop annoying oil links by installing a new primary cover gasket. This primary cover gasket is compatible with models that feature the swinging arm frame. Replaces BSA part number 42 7507. Fits BSA pre unit twins (A7, A10, Goldenflash, Super Rocket, etc) from 1954 1963. Also fits BSA singles (B31, B32, B33, etc) from 1954 1957. Please refer to your parts book to ensure the best fitment.