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Topics - DADSBIKE

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Pre War / S28 VALVE SPRINGS?
« on: 10 April, 2017, 12:39:13 »
I have a 1928 BSA S28 (SV 493cc) the exhaust valve spring seems very feeble, the exhaust valve can be lifted off its seat with my fingers.....is this normal?!....... if it's not, any idea where to find replacement...would an M20 or similar fit?

thanks

john

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Pre War / Exhaust valve lifter
« on: 15 February, 2017, 09:24:48 »
Hi Chaps,
does anyone have a drawing or close-up photo of the exhaust valve lifter (decompression) on the engine of an S28 BSA (1928 493cc single)?
Mine just has a plate bolted between the tappets, where 'something' has broken off.

Thanks

john

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