2019 Honda CRF450RX First Ride Review

The engine features a new scavenge pump design with two 12mm pumps, up from a single 16mm pump, for increased lubrication and reduced friction inside the engine, improving peak performance and enhancing over-rev characteristics. Also, a revised clutch lifter and pressure plate allows optimum oil supply to clutch plates and friction discs, resulting in enhanced durability. This is especially nice for slow-speed maneuvering when the clutch is used heavily.