The current generation of the Suzuki RM-Z450 was introduced in 2018. Minor suspension tweaks were made the following year, but the bike hasn’t changed mechanically since 2019. Still, the RM Army’s flagship motocrosser is a good bike in stock trim and can be noticeably improved with relatively basic modifications such as a suspension revalve and installing an aftermarket exhaust—preferably a full titanium system to help bring the weight down in addition to adding power.
After shaking down the 2022 RM-Z450 with the Suzuki crew at Glen Helen Raceway, we installed a fresh air filter, mounted a Dunlop D404 street tire on the rear wheel, and ran it in our in-house dyno. As expected, the unchanged model made similar figures to what it did last year with 50.3 hp at 8,500 rpm and 32.9 pound-feet of torque at 7,400 rpm.
Although the Suzuki makes the least peak horsepower in the 450 motocross bike segment, it still has more than enough power for the vast majority of riders. Peak torque is 0.5 pound-feet more than what the Kawasaki KX450 and Yamaha YZ450F make. We’ll do plenty more on-track testing with the yellow machine before bringing you a full review of it here on dirtrider.com.