I am going to order a YZF black stock capacity Clarke tank for my WRF450 2003. In order to save some money i am trying to find a way to fit the stock WRF seat on the new YZF tank. I compared the seat with the one from my 2003 YZF250 and saw that the YZF seat is about 2cm longer. I was wondering if i can add some seat foam on the WRF seat to make it a little bit longer and fit with no problem on the YZF tank. Has anyone tried something like that or i will waste my time?