Suzuki claims improved starting performance for the new models, courtesy of updates to the ECM ignition programs. Other than that, the only change is the Champion Yellow-and-black graphics. Race-inspired graphics, of course.
The minimal changes for 2014 aren’t unexpected, as Suzuki gave its 2013 RM-Z models a significant revision. The 2013 RM-Z250 sourced a wider 48mm fork and other chassis revisions. Powertrain changes included a lighter piston, revised cams and timing, as well as a new five-speed transmission.
Last year’s RM-Z450 sported updates similar to its smaller sibling, like the bigger fork and chassis alterations. The piston was lightened as well, with tweaks to the transmission and electrical system.
The 2014 Motocross model year changes thus far are highlighted by a complete overhaul of Yamaha’s YZ250F, which finally makes the switch to fuel-injection and incorporates the rear-facing cylinder design showcased on the Tuning Fork brand’s 450 model. Speaking of which, the YZ450F also gets significant updates, with the second generation of its rearward Single as well as revisions to the frame and suspension.
From the other Big Four, Honda has revamped its 2014 CRF250R with engine and chassis updates. Kawasaki is yet to reveal its 2014 KX450F/KX250F models, both reigning MotoUSA MX Shootout champions.
KTM has also tweaked its 2014 SX models, with transmission updates.