In 1985, Honda also introduced the new ATC350X. The ATC350X was another high-performance three-wheeler, similar to the ATC200X, but as an entirely new machine. The 350X featured a 26-horsepower (19. 4 kW) air and oil cooled 350 cc (0. 350 L; 21. 4 cu in) four-stroke engine with a 4-valve head; impressive technology for the time. The engine was so good, it found its way into many hybrid race four-wheelers in later years. The engine was a torque monster, and Honda wasn't afraid to call the 350X "the King of the Hill" in its marketing of the machine. The suspension was a step in between the all new ATC250R (which featured a 246 cc (0. 246 L; 15. 0 cu in) liquid-cooled 2-stroke engine and nearly 10 inches of travel in its suspension, front and back) and the ATC200X, with 8. 5 inches (220 mm) of travel in the front forks. The 350X featured disc brakes with dual piston brake calipers for superb stopping power. However, the 350X suffered in handling with an underbuilt chassis which made the machine unpopular with racers, except for those who chose to be different by racing a four-stroke machine as two-strokes were the engine of choice at the time. The aftermarket came out with a custom gusset kit that significantly strengthens the frame at its weakest points for riders that wish to build a race machine.