BSA Owners' Club Forum

The BSA Workshop => Pre War => Topic started by: DOIVEY on 24 July, 2017, 21:44:59

Title: B21 tappet Clearances
Post by: DOIVEY on 24 July, 2017, 21:44:59
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
Title: Re: B21 tappet Clearances
Post by: JulianS on 25 July, 2017, 11:57:19
The photos are from the BSA book by D W Munro, 1954 edition.

Should give you answers.
Title: Re: B21 tappet Clearances
Post by: DOIVEY on 26 July, 2017, 19:10:03
Thanks Julian, much appreciated.