The Tuning Fork brand also focused on the WR450F’s chassis for 2021. The bLU cRU’s flagship enduro bike features the latest evolution of Yamaha’s aluminum bilateral beam frame, which has been redesigned with new wall thicknesses and flex characteristics that are designed to provide improved cornering performance, traction, and bump reaction to give the rider more confidence to push harder in a variety of off-road conditions. The engine mounts, top triple clamp, and front axle have been refined to reduce weight, match with the new frame, and improve handling and performance. The WR450F’s KYB suspension components have different compression and rebound characteristics to complement the new frame as well. Additional changes to the chassis include a newly designed front brake caliper, front disc, and brake pads.