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Topics - Bess

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16
Twins / A65 - O rings
« on: 04 March, 2017, 14:41:06 »
Hi All,

Does anyone have or know where I can get a list of all o rings sizes for the engine?

Thanks...

17
Twins / A65 Oil pump diffences
« on: 03 March, 2017, 16:17:52 »

I putting together a couple of A65's and have checked assembled 2 oil pumps. A 1960's the other 1970's, the 60's pump has a counterbore in the non return valve ball location.

Please see attachment

My research has found the valve spring is the same for all years so I guess the counterbore has little effect on the pump function.

Is there anything I need to be aware of due to this difference?

Thanks for looking.

18
Twins / A65 Piston advice
« on: 19 February, 2017, 18:15:01 »
I'm at a point where I need to buy new pistons for our latest A65 projects, I have a Lightning my son a Thunderbolt. I have read plenty of horror stories of what to and what not to buy. What make should I buy and would fitting 7:1 ratios be a better option for less vibration etc. ?

19
Which BSA do you ride? / A50
« on: 12 February, 2017, 18:32:12 »
Put this together as a all-rounder to ride in any weather, hence the extensive use of aluminium and stainless fittings and fixtures.

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