Vintage motorcycle engine made by SA or AS??

[BikerBill]

Hello,

I recently bought this motorcycle engine, it is currently seized and obviously needs work to get it into running condition, I have the head but it has many broken fins. It has a logo cast into the mag chain cover which is either SA or AS, in all my years I have never come across a motorcycle or engine maker that has this logo, could anyone shed any light on this? I have looked online but without any success. It may be British or maybe European?

Any help would be much appreciated.

[Old-codger]

Hi Bill welcome to the forum, The S A stands for Sturmey Archer who most people will know from the gears on old pushbikes but many years ago they also made engines and gearboxes for motorcycles. 

[BikerBill]

Of course!! now it all makes sense. Thank you Codger, thats most helpful....

 

[Yorky]

17 hours ago, BikerBill said:

 "and obviously needs work to get it into running condition"

I just love that understatement