Spark eroding valves BSA 1929

[robbsa]

Hi All,

I need to get some slots eroded into my valves for my BSA1929. Got some new valves from BSA Bob? a few years ago but without slots to hold the pin for the valve springs. I'm in the bristol area - tried a company in porttalbot who said they could do it, but have failed to reply to my messages since.

Anyone know of any other options out there?

Many thanks
Rob

[chaterlea25]

Hi Rob,
Recently I rebuilt a BSA G14 BSA V twin engine for a friend and was faced with the same dilemma
I have come across quite a few failures of the keepers for slotted valves and talking to quite a few guys on the USA Cannonball Run last year their experiences were similar and most had opted to convert to collet retainers
On the BSA I searched around for suitable valve caps that would fit the BSA springs
I had some Triumph ones where the tapered BSA spring sat nicely on the inner spring land
Some measuring up to get the correct  position on the stem and turning a simple groove on the valve stems to suit the Triumph collets and job done

John