BSA B31 B33 Black Engine Cover Plate – Classic British Made, OEM Spec 42-4272

Here’s a proper classic bike part, made in the UK.

It’s the rear engine plate cover for BSA B31, B33, and also fits A7 and A10 models.

Black finish, solid construction, and it references the original OE number 42-4272.

This is a brand new replacement part, unbranded but 100% built to do the job.

If you’re restoring or maintaining your vintage motorcycle, this one’s a straight swap.

No fuss, good quality, and exactly what you need to keep that engine looking clean and protected.