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Topics - RichardAB

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Singles / B33 Exhaust valve guide
« on: 11 September, 2017, 20:15:39 »
Hi
Please can anyone advise me the correct internal diameter of exhaust valve guide(cast iron) to suit 1960 B33. Plus tolerances
Thank you
Richard

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Singles / BSA B33 sticky exhaust valve advise please
« on: 11 August, 2017, 18:05:14 »
Hi I've previously had problem with exhaust valve sticking & pushrod jumping off on my 1960 B33 This hadn't occurred for a number of miles - probably 2,000 - until today. I had done 30 miles closed down throttle a little to take a corner,the engine note changed & off came pushrod. The problem is the exhaust valve sticks/seizes temporarily Luckily no damage & an easy roadside fix with some tools I've adapted.I continued but only did another 5 miles & same happened again. I nursed bike home by stopping every 4 miles to allow bike to cool a little.

The engine seems to be running very hot. I've made no recent adjustments to settings so why has this re occurred?

I'm aware this is a problem with other 33's & mine has been ok for a good while as I say at least 2,000 miles.

Any thoughts please?

Thank you
Richard

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