Was wondering if I-90 Motorsports has seen any of the 790 ADV's yet - they state that they are the largest volume KTM dealer in WA State. I picked mine up in Olympia last Saturday. They were sent two R's, and I was number two. I asked who got the first one, and I was told a lady from Wenatchee got it. Regarding tank sludge - it was the first thing I checked when I approached the bike with the key and it showed no residue at all... The guy that walked me through the bike features was the senior KTM tech, and he said that he had seen nothing from KTM directing them to check the tank for FOD and/or clean as required. I also entered into the discussion regarding the spark arrester (SA) concern, and he was unaware of anything that would validate the stock exhaust as being USFS SA approved. He checked the stock muffler and confirmed it would not pass any kind of 'poke check'. The emails I sent to the USFS SA guy with the stock muffler markings and the inquiry to the KTM USA office in CA about the stock mufflers meeting SA requirements (see post # 11124)... not a peep... and I sent second requests on Monday.