2014 Motocross Bikes Recap

The five heavy-hitters on the motocross scene have now unveiled their 2014 models… Here’s a brief recap on the four-stroke machines… If you like what you see, we’ve got extensive details on all 2014 MX bikes in our September Issue (#35). We’ve also got a test on the 2013 Yamaha YZ450F vs the 2014 Yamaha YZ450F in our October Issue (#36). In that same issue, we put the all-new YZ450F up against Kawasaki’s 2014 KX450F. You can grab print or digital editions of both magazines here.

The 2014 CRF250R features an all-new engine and rolling chassis. The new frame is designed to lower the bike’s centre of gravity, incorporating a dual-muffler exhaust system to further sharpen handling by centralising the bike’s mass. A revised engine is claimed to add a load of mid-range punch, due to the additions of a new cylinder head, new piston, higher compression ratio, plus a new dual-timing fuel injection system, and a new transmission. New for 2014 on the CRF450R is the intake and exhaust ports, Dual-Timing fuel injection and redesigned muffler internals, claimed to boost torque output and increase throttle response. Also, in the suspension department, revised internals in the Kayaba Pneumatic forks claim to yield improved damping response for improved bump performance.

To view all of the information on Honda’s 2014 models, click here.

To save weight, the 250SX-F’s previous six-speed transmission is now a five-speed, and the 450SX-F gets an updated muffler to keep noise down. But aside from the upgrades to fuel filler cap, graphics, chain guide, seat foam, and the clutch and brake master cylinders, KTM’s 2014 motocrossers remain otherwise unchanged.

To view all of the information on KTM’s 2014 models, click here.

The KX250F gets the launch control system that was implemented on the KX450F in 2012, making it the first bike in the 250 class to have this holeshot-helping technology. The chassis gets a tweak via the front engine mounts, as the high-tensile steel plates are now 29% thinner than the 2013 units. The KX250F also receives revised Showa Separate Function (SFF) fork settings, rear shock tuning, an upgraded transmission and low-density compound grips. Last year, the KX450F received Kayaba Pneumatic forks, a stiffer swingarm, new ECU settings and upgraded engine internals. For 2014, it gets new soft-compound grips and new decals on the shrouds.

To view all of the information on Kawasaki’s 2014 models, click here.

The 2014 YZ250F will feature the same frame and body work as the YZ450F. The biggest news is that the 250 also gets a four-valve, reverse cylinder Electronic Fuel Injected DOHC engine – the same as the 450 received in 2010. Essentially, the only parts on the 2013 models that will remain on 2014 machines are the front fender, front number plate, brakes, Kayaba suspension, and rear wheel. For 2014, Yamaha introduces a completely new YZ450F, featuring a new chassis, motor refinements, and suspension upgrades.

To view all of the information on Yamaha’s 2014 models, as well as a ride impression, click here.

Minimal changes are featured for Suzuki’s 2014 four-stroke motocross bikes, after significant upgrades were made for 2013. Both RM-Z250 and RM-Z450 models are claimed to have improved starting performance, courtesy of revised ECM ignition programs. Other than that, there are now two-tone radiator shrouds, new graphics and yellow number plates. Both bikes feature liquid-cooled battery-less fuel-injection systems, five-speed transmissions, Showa Separate Function (SFF) forks, aluminium cylinders with Suzuki Composite Electrochemical Material coating, Renthal aluminium Fatbars, gripper seats, wave disc rotors and Excel aluminium rims.

To view all of the information on Suzuki’s 2014 models, click here.