Long time not here,this is the second time I bring my 00 FXDX to the dealer (not an official one but a HD specialist). When I bougth the bike, it has a very low fuel consumption but runs poorly (it was parked for nearly 2 years). I changed the not-legal exhaust pipes by US stock pipes bougth on Ebay and had a huge maintenance. Now the dyna runs very fine but I notice a huge increase in fuel consumption : 31,3 miles par gallon (7.5 l/100 km) !! The mechanics does not understand what happens, he checked and cleaned again the carburator but I still have this poor mileage :-( . The dyna is a 00 model, 8700 miles, with stock US pipes and SE air filter. Can it be some kind of electronic problem that only a dealer with a scanalyzer can find ?