[Logger74]

Quick Google finds what appears to be a very similar looking tank, but not exact.

This one is a 6.6gln for the WR450.

Acerbis Yamaha WR 450 F 2004-2006 Gas Tank - Blue - Yamaha - 6.6 Gallon

Purchase the Acerbis Yamaha WR 450 F 2004-2006 Gas Tank - Blue - Yamaha - 6.6 Gallon from SportbikeTrackGear.com. Get the lowest price, free shipping deal, easy exchanges and no restocking fees - Guaranteed!

www.sportbiketrackgear.com

View attachment 234870

Not cheap, by a long shot.