The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: bsa-bill on 26.07. 2010 22:13

Title: Rocket valve cups
Post by: bsa-bill on 26.07. 2010 22:13
Hi Folks  - while I've got the head off, thought I'd check everything out while I wait for bushes arriving.
One thing I'm not 100% sure about is which way up do the bottom valve springs cups go.
I have them with the wider boss to the bottom, is this correct
Title: Re: Rocket valve cups
Post by: muskrat on 26.07. 2010 22:25
G'day Bill,
                I'm pretty sure the narrow side goes down. Less area for heat transfer. See which side the springs fit better.
Cheers
Title: Re: Rocket valve cups
Post by: dpaddock on 27.07. 2010 14:03
The bottom cup centers the springs. Fit it to do this.

David