Starfire Exhaust Valves

[Beesy]

Hi All.

I have bought a bare cylinder head as I fancy re-furbishing one to have as a spare. I see from Draganflys Spare list there is a choice of 3 different exhaust valves!

Any ideas on how I can tell which one I need? I have no idea what year the head is.

Cheers

[Rupert]

All B25 exhaust valves are he same shape and size so are interchangeable for all years.
I'm aware of three versions though -
First type borrowed from A50 has 68..... part number
Second type no change except part number
Third type material change to Nimonic 80

Fit whatever you can get hold of these days.

[Beesy]

Ah, that makes sense. I was thinking that there must have been different sizes.

Much appreciated.