I travelled over 8,000 miles in north America this year with one of our group on an 800 GS. The fuel pump on that bike seemed vulnerable to the ethanol blend fuels. In 2009 it had done a rtw and had pump problems. A new pump was fitted back in the UK which was trouble free until it got a diet of higher ethanol fuel this year when the new pump also gave trouble. Jammed completely at one point and then would loose output pressure later in the trip when it was warm. The jam was solved by removing it from the bike and bashing it on the concrete pavement It was too scared to give trouble for several days after that. It wasn't as troublesome as Rod's bike though.