I have about $8100 total invested which includes Pete's Cams, 19 tooth sprocket, PCV, AT200, and having the sidecar color matched, bought it new with great dealer discounts.
As to speed mine cruises around 60-65 mph depending on wind and terrane, a strong head wind will slow it down some. Fuel economy is only 48-51 mpg, not bad for considering the sidecar decreased it from 70-77 mpg.
Grant