Mod to improve 7" front brake.

[EDDIE SIMPSON]

i have reversed the brake lever on a a10 full width hub with good results. cant work out how to post photos on this site but mr Pike of bsa race developments department photoed their racer with the setup that i copied.

[Bigsingle]

Then the "best" solution is to get the wheel spokes tensions right then send the wheel and brake to a specialist to have the drum skimmed and the brake shoes turned to fit with a modern high friction lining.  The problems is the diameter as you want to find someone who can munt the whole wheel. A lot of places will do the hub/drum but that means rebuilding the wheel with the risk of distorting the drum.
The common fix if its an offroad bike is to have two front wheels, the standard one and one with a modern Jap alloy brake, this will get you a nice light 6" or 7" hub/brake that works well and these are often 21" as they come off trail bikes.  I was looking at brakes a the Talmag as I have a 350 Matchless set up as a trail bike, about 50% of the pre-65 bikes had small Japanese/Spanish/Italian front hub / brake units on 21" rims

I fitted Brass stranded linings,go to an old brake shop, I think it's industrial,they should be able to bond some on, its much the same as RGM gold shoes for a Norton.Get them to machine the diameter to the drum. Cheers