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Messages - Bess

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Twins / Re: Rocker oil feed
« on: 29 November, 2020, 10:24:08 »
Hi Dave,
             Good analogy.

The equivalent pipe length system is mainly used by humble plumbers as it gives a speedy way to calculate pipe diameters to keep pressure losses within requirements. Using a swept tee or better still a 'Y' piece would be preferable.

There are still some BSA unions still about:

Best wishes...

Twins / Re: Rocker oil feed
« on: 28 November, 2020, 22:25:44 »

Twins / Re: Oil tank removal
« on: 28 November, 2020, 22:22:26 »
    Extract from the maintenance manual:

Best wishes...

The Star and Garter / Re: Two things
« on: 28 November, 2020, 10:36:22 »
Hi Roy,

    Depends on which carb, Amal suggests 4th or third:

I always drop copper in water, it dislodges the oxidization. Using oil to quench, hardens steel without cracks or if you get the temp right it adds blue to slow corrosion.

Best wishes...

Twins / Re: Rocker oil feed
« on: 26 November, 2020, 20:38:30 »
    BSA suggested cutting approx 2" of hose, fit onto pipe at the top of the oil tank, blank the other end with a rivet securing with 2 hose clips either end.

Whilst building my bike I brazed the oil tank pipe end and finished with a plastic cap end.

Best wishes...

Twins / Re: Wet sumping
« on: 26 November, 2020, 17:06:43 »

Straight from the A50/A65 manual:

Personally I wouldn't fit a valve, my memory isn't that reliable and my son sometimes takes my bikes and I cant guarantee he would open it either.

Fitting a new pump solved the issue in 2 of my bikes.

Best wishes...

Twins / Re: Rocker oil feed
« on: 26 November, 2020, 16:58:30 »
    In Sept 1966 BSA issued a service sheet to improve camshaft lubrication. It had a list of parts to carry this out, a new crankcase oil pipe union where the oil to the head comes from under the engine. The original feed from the top of the oil tank was plugged.

It seems from your description this has happened. Later models were dispatched with the new oil union under the engine and an oil tank without the oil feed.

Best wishes... 

Twins / Re: A7 auto ad/ret unit
« on: 26 November, 2020, 12:00:07 »
    I would try here, experienced honest trader and frequent bike user:

Best wishes...

Twins / Re: Clutch and valve springs
« on: 25 November, 2020, 20:27:44 »
 Valve springs, if their length has reduced more than 1/16" or any signs of cracking replace them.

 Check the plates first. Clutch springs, check the lengths are approx the same, when adjusting if the run out is greater than 1/64", the clutch slips and the coils are bound replace them.

Best wishes...

Which BSA do you ride? / Re: B31 Plunger
« on: 23 November, 2020, 22:14:57 »
     I like it, nice and simple lines  :) :)

Singles / Re: b31 seat
« on: 22 November, 2020, 16:31:26 »
    These look nice on the A10 frame, could be adapted for the B31?

Best wishes...

Twins / Re: 1968 a65 fitting remote oil filter
« on: 22 November, 2020, 16:24:23 »
Hi Mike,
             Good to hear all went well with the design, the two home here are fine. I have put something together for a A10, not too happy with it yet so back to the drawing board  :(.

Best wishes...

Singles / Re: Up to shear and back a thread......
« on: 22 November, 2020, 11:55:24 »
     I don't think any were published.

 The A50/A65 give 16/18 lb/ft for 5/16" dia crankcase studs/bolts, I would use that figure in the absence of anything else.

Best wishes..

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