Hi Bill, At the moment it is all stock, I was thinking of an fcr and an Acra but not sure. I am basically not sure about the fuel consumption. At the moment the bike could easily do 500 km on pavement and 400-450 gravel. It should not change much but don't know :huh Wanted to change the bike big time before but got busy with building the Navigation Tower and that took some fare amount of time. I am in search of the 660 rear tanks. Was going for a proper Rallye bike D.