If I were in the market for one of Yamaha’s off-road models and had to choose between the YZ450FX and WR450F, I would have to really decide what features I wanted most. The headlight, taillight, radiator fan, EPA spark arrestor-equipped muffler, and enduro computer are nice add-ons that don’t come on the FX. However, the FX has a more powerful engine package and slightly better stock suspension settings. I would say with a few performance upgrades, like an aftermarket muffler paired with the available GYTR ECU that is programmable through the CCU Bluetooth adaptor via Yamaha’s Power Tuner app, the engine could almost equal the YZ450FX. With some personalization to the suspension, I may have the best of both worlds.