We stop for lunch and fuel in Pinedale. It was here we discovered John's 640 was only getting about 28mpg. We've run about 230 miles since leaving the truck which should have been no problem with his 6+ gal tank, but he was on fumes when we fueled up. Had he not taken a couple gallons from Wild Bill's gas cans yesterday he would run out of gas a good ways back. He'd also noticed the bike was down on power as soon as we left the truck. Weird stuff since the bike ran great in Idaho last year. Over lunch we figured out the only thing different was filter skins, so we pulled it off and the bike jumped back to 40+ mpg at the next fill up. From Pinedale we run a bit of slab and then start up to Union Pass. .