42 years in the business, a factory finish and great service and selection are all reasons to purchase a Clarke Fuel Tank. Guarantee: Clarke Fuel Tanks carry a 30 day guarantee against defects and a 1 year against breakage. Some restrictions apply. NOTE: 2003-2004 WR250 / 450 must use YZF radiator shrouds. 1998 - 1999 WR400F, 2000 - 2002 WR426F, and 2001 WR250F models require the use of YZF seat for proper fit.