Omar's largest volume Champion tank-about 1 1/2 gallons. Fits narrow frame bikes including a 650 Yamaha (if you remove the elephant ear cups). If using a small tank on a 650-order a narrow fender. This tank is made from a three-part mold and will show the mold lines-you may have to do a little body work before the normal prime/paint process. Tank mounts with front and rear tabs-my instructions will show different mounting techniques. Tank comes with non-rusting chrome filler neck (just like all our tanks), a gas cap with check valve and pet cocks.