about the gas mileage, everyone says 60 to 70. First tank, only got 47. Second tank doesn't seem much better. Anyone know if this is just California emissions? Have the under seat setting on number 2.

Same here. I've got a 2014 690 Enduro R with about 1800 miles on it. I'm 225 lbs, and do not have any accessories on the bike yet. I haven't been able to eek out any more than 45 MPG. And I haven't taken it offroad at all yet.

I'm also in CA. But that can't be the reason. You'd think with CA's more stringent emissions standards, we should be getting BETTER fuel economy (usually at the expense of performance) than other states!

Only being able to go 140-150 miles on a tank is not very fun.  I've been researching aftermarket tanks. So far I've only found supplemental tanks. I'd rather get a replacement tank- something that can bolt on in place of the original tank but that has slightly larger fuel capacity. I guess noone has designed such a tank yet for the 690 Enduro?