The stress across a surface element (yellow disk) is the force that the material on one side (top ball) exerts on the material on the other side (bottom ball), divided by the area of the surface.
Overview. The WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013. It comes equipped with a 449cc engine, which is slightly larger than average for a 4-stroke motor.he WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013.
These info packs should fit all WR450F, YZ450F, WR250F and YZ250F models with a 20mm front axle and 22mm rear axle. Don't email us about bikes that aren't listed, or the earlier WR400 and WR425 models. We haven't tested those and simply don't know how much of these info packs would be correct or not.hen they come up on Ebay these wheels will be around $150 to $300 each. You can also post a request at www.findapart.com.au and the wreckers email you with their prices; just take your pick! Most wreckers post worldwide if you have trouble finding a particular wheel.