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Mancha, maybe "trick" was not the right word. What I meant was that it looked classic, or cool or something like that.
That said, drum brakes aren't the limping, sponge filled, chocolate donuts many people believe they are. All during the very fast, classic racing period of the "continental circus", during the 50' and 60', racers like Hailwood, Agostini, Bill Ivy, Saarinen, Sheene, Read, and others were depending on drum brakes to stop them very quickly indeed under race conditions.
Granted, disc brakes today are incredibly powerful and effective, but if you go back to the early days of factory motorcycle disc brakes, besides looking very modern, they were hardly anything to write home about, and they were downright treacherous under wet conditions. Some of the early disc brakes, especially the Yamahas, were more like on/off switches than brakes. Happily things have improved since then.
Anyhow, a properly set up double twin leading shoe, or even single twin leading shoe drum system can stop a Bonneville sized bike very quickly. Proper set-up, you might say, is/was the real problem with motorcycle drum brakes, i.e., they're difficult to get right, but if you have a quality system and know what your're doing they can compete very well with discs. Trick? Maybe not, but potentially as good as a stock factory disc is not far fetched, IMHO.
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