Although the black look isn't for me, I certainly understand the appeal. It does look good. The only thing I can say is, you should pick one medium of black, either gloss, semi, or flat, and EVERYTHING should be the same. I assume since the pipes are Flat, you would go with that. However, as much of a bitch as it would be, that means you should go with a flat black frame too. Three different degrees of black just throw it off a little.
As for the engine, would it be easier to buy a chrome engine kit, and then just paint all the peices black before applying?
Who makes the seat? Does the Mrs think the back seat is comfy?