One member does have both of his SM wheels black powder coated. Someone in Italy or France if I recall. They really look good. As for the sprocket cover, the T100 chrome cover looks really nice with the Speedmaster. They don't have the george Formen grill look. I have one and also a chrome clutch side cover and I am going to trade my black electrical rotor cover with biker for his chrome one. The chrome and black contrast looks very nice, in my humble opinion.
