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Title: Blue Star timing chest oil regulation valve
Post by: David Samways on 23 Sep, 2022, 00:28

Can anyone tell me at what I should initially set the timing chest oil regulation valve?

I also need the control spindle "key" 27-1427 if anyone has a spare.

Title: Re: Blue Star timing chest oil regulation valve
Post by: Bicycle repair man on 23 Sep, 2022, 09:23

The BMS book of the BSA gives the initial setting at 1/2 to one turn out from seated. I struggled to get good oil pressure at any setting and found that the ball bearing in the pressure valve was pitted. This is sealed with soft solder. Early models were set at 5psi and later ones at 10psi. BSA recommended fitting the later type in a service bulletin.
I rebuilt mine and set it to 10. Pressure problems resolved!

Title: Re: Blue Star timing chest oil regulation valve
Post by: David Samways on 23 Sep, 2022, 11:08

Many thanks BRM. I take it that the pressure valve is the item to the left and perpendicular to the regulator valve?

Title: Re: Blue Star timing chest oil regulation valve
Post by: Bicycle repair man on 23 Sep, 2022, 11:25

Yes. Secured with a lock nut.
Just had a look through my spares. Can't help you with the adjuster knob.

Title: Re: Blue Star timing chest oil regulation valve
Post by: HasseC on 23 Sep, 2022, 16:08

Hello David!
I think I have what You are looking for.
Regards Hans

Title: Re: Blue Star timing chest oil regulation valve
Post by: David Samways on 26 Sep, 2022, 00:21

Thanks Hans, PMed.

BSA Owners' Club Workshop Discussions

The BSA Workshop => Pre War => Topic started by: David Samways on 23 Sep, 2022, 00:28