Just installed an IMS 3.1 gallon tank on the WR450F. The people at IMS have done their homework again. Fits perfectly. IMS provided two locations for the seat post mounting so the tank works on both the YZ and WR450's. The WR installation also requires YZ shrouds. I did find the provided fuel tubing a little short and think a dual self sealing quick disconnect is mandatory for the cross flow. Anyone tried the motion pro disconnects?