Author Topic: Tapping valves etc  (Read 258 times)

Online BSA500

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Tapping valves etc
« on: 25.08. 2018 12:18 »
In an effort to stop,it seems, one valve from tapping,What is the valve clearance on an A7 when the engine is hot??. Sorry it's got an alloy head

Offline muskrat

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Re: Tapping valves etc
« Reply #1 on: 25.08. 2018 20:54 »
G'day BSA500.
The book says cold 8 & 12 pre '60 and 8 & 10 for 60 onwards. Depends how hot you get her. I have to run with 10 & 14 in summer and 10 & 12 in winter as the clearance closes up with heat and props the valves open.
So in answer to your ? You only need 2 to 3 thou" when really hot.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7