I just bought a 2000 XR650 and had a laugh when I noticed the section of the gas tank on the left side that is lower than the petcock! It probably holds about 1/2 gallon but you can't get it without riding over some whoops and hoping it splashes over the center hump (not what I like to do if I'm trying to make it back to camp on fumes) or stopping and leaning the bike waaay over on the right. I think it is even lower than the float bowl! Anyway, has anyone bought a bigger tank from IMS or Acerbis and ,if so, is all the fuel carried higher? The pics online are not very clear and I'd like to see another XR with an aftermarket tank mounted. I'm talking 3.5 to 4 gallons not that huge thing Acerbis sells.