i have a clarke oversized gas tank(3 gal. i think) on my 99 cr250. it seems like im filling this sucker every 3rd time i go riding. I dont ride hard at all, im not constantly on the power band, and i only ride on hills and trails for about 1-2 hours each time. Is it normal to use this much gas? i thought a 3 gal tank would last for ever.. but it sure goes fast. Could it be a jetting issue? or is it just normal? Thanks!