Rearward-Slanted Cylinder Design
The WR450F’s distinct rearward-slanted cylinder design - complete with rear exhaust and forward-mounted intake system - features a cylinder head that works with the frame geometry for optimised weight distribution. All the updates found in the race-focused YZ450F are specified including a light, compact cylinder head, aggressive cam profiles, high-compression box bridge piston design with DLC-coated piston pin and more.
Engine Tuned for Enduro
WR450F-specfic ignition and fuel injection maps are optimized for enduro riding and racing featuring longer and stronger pulling power with increased controllability.
Unique Intake and Exhaust Systems
The WR450F features a two-piece air filter that works in conjunction with the tuned intake tract length and a WR-specific muffler to boost the linear feeling of traction and drive. The WR450F muffler is completely mechanical, eliminating the need to repack.
High-Capacity Radiator
The WR450F uses a large radiator with excellent cooling capacity shared with the YZ450F motocrosser, complete with a cooling fan for consistent performance during the toughest enduro rides.
Electric Starter System
The WR450F features a compact electric starter system to simplify restarts on the trail and add convenience everywhere else.
Advanced Fuel Injection
The engine breathes through a 44 mm Mikuni throttle body fed by a high-pressure electric pump to ensure optimum fuel atomization and power for a wide range of riding elevations and conditions.
Robust Transmission and Clutch
The WR450F’s wide-ratio 5-speed transmission provides the optimized gear for tight technical terrain as well as wide-open fire roads. The clutch system has a light pull with specific heat-resistant friction plates for tough enduro competition.
