Print Page - B31 Valve Seat Grinding

Title: B31 Valve Seat Grinding
Post by: Andmaxjar on 09 May, 2017, 23:40

Hi All,
Can anyone tell me the a the angle that the valve seat needs to be cut at for a 1949 B31.

Cheers
Andy

Title: Re: B31 Valve Seat Grinding
Post by: STAR TWIN on 10 May, 2017, 06:29

Generally 45 degrees would be correct. You can get into all sorts of discussions and complications with what is best - especially in racing circles - but for most road bikes 45 degrees is it.

Title: Re: B31 Valve Seat Grinding
Post by: Bess on 10 May, 2017, 10:37

Hi,
Here's an extract from BSA A65 manual, generally the same for all...

Best wishes...

Title: Re: B31 Valve Seat Grinding
Post by: Andmaxjar on 11 May, 2017, 23:06

Hi,
Many thanks for your replies.

Cheers
Andy

BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Andmaxjar on 09 May, 2017, 23:40