Hauling stuff around on your WR250R can be a challenge. Enter Wolfman Motorcycle Luggage. Their Wolfman Enduro Tank Bag, shown above, fits the tank and seat area of the Yamaha WR250R perfectly, allowing you to carry small items in a convenient and easily accessible area of the bike.
The bag features a 4-point quick release mounting system, and the no-skid/no-scratch pad keeps it in place during the most aggressive of off-road riding. It's innovative design allows the bag to sit on the tank and not interfere with the gas cap or the vent hose. Other features include an interior mesh pocket, outter mesh pocket, removable clear map pocket, and key clip. The contents of the bag can be accessed by un-zipping the heavy duty zipper that runs around the top of the bag, and then flipping the top up. An optional waterproof cover is available as well.
You won't find a better tank bag for the WR250R!