Can anyone in the know enlighten me as to what the clearances are for the inlet and outlet on the B21 please.
when i rebuilt the engine i set them by rotating the pushrods without resistance and making sure they didn't rattle vertically.
i just wondered what the correct values are.
thanks in advance
david
The photos are from the BSA book by D W Munro, 1954 edition.
Should give you answers.
Thanks Julian, much appreciated.