I have a 99 wr400 with a 4 gallon desert tank and a YZ seat set up. Its great for weekend runs or long trips but I want to get a smaller tank for day trips to loose some of the weight. Does anyone know if the Clarke YZ tank will fit my WR frame. I know they make a WR tank but the purpose here is to buy a small tank so I want the YZ tank. I know you have to buy a seat to use with their tanks but I plan on doing this anyway cause my IMS CEET is made of rocks it seems. Its got to be the hardest seat ive ever sat on. So I plan on upgrading the seat also but need to know if their YZ tank will work on my WR. I have to use the clarke tank cause my bikes solid black and they are the only ones I can order a black tank from. Can anyone help with a for sure on this one. P.S. Any advice on a very soft YZ aftermarket seat??? Thanks in advance "cheers"