There are tons of gas tanks for WRs out there, but most of them seem to be for pre '07 bikes. Some seem to fit the perimeter frames of the aluminum bikes from '07 - '11 but there is nothing for the EFI WRs except IMS. I managed to pour in 7.5 L after 100km of 80% offroad riding, that is 1.98 gal after 62 miles. Besides that being quite a thirsty value for a bike that won't drool fuel through a carb's overflow hose something in the range of 2.2 to 3.0 gallons would be interesting. Especially important would be that the tank must not bend the seat and should not require more spreading of the legs. The IMS appears to be quite wider, judging from the shroud to seat gap: https://www.imsproducts.com/images/Generic/large/117333.jpg I'm aware that the fantastic ergos of my WF400F with YZ tank and seat won't be a reachable goal, just curious what you guys are running on your EFI WRs for real back country usage.