Initially I planned to keep the original drive sprocket and the band brake setup. But I read bad feedback about this band brake on account of it not braking and also binding. Here's a shot of the stock sprocket with welded on brake drum.
Stopping is a top priority so I opted for the dirt bike front disc brake. Most of the braking is accomplished by the front brake anyway. The KX65 hydros replaced the flimsy EBRs and the CR85 aluminum spoke rim with rotor replaced the Bernardi mag. The caliper is off KX65. Brake line is some 60". Those are Tomos triples bored out to 33mm.