WHAT ARE THE NUMBERS, DIMENSIONS & SPECS OF THE 2014 YZ450F? The 2014 Yamaha YZ450F cylinder is slanted rearward 12. 7 degrees, which moves the cams 2 inches closer to the center of gravity. Unfortunately, the radical slant of the cylinder meant that the exhaust port had to move to the rear and the intake port to the front. Yamaha never wanted to move the fuel injector to the front and the pipe to the back, but it was a necessary byproduct of their desire to harness the gyroscopic forces. But, the cylinder is the only part of the 2014 YZ450F that has been moved: Width. The 2014 YZ450F is 14mm narrower at the radiator wings than it was in 2013. Overall height. The 2014 YZ450F is 22mm lower than the 2013 bike. Seat height. The 2014 YZ450F seat height is 24mm lower than in 2013. Wheelbase. The wheelbase is 14mm shorter than on the 2013 bike. This is because Yamaha used the same chain, but went from a 48- to a 49-tooth rear sprocket, which pulled the wheel forward. Ground clearance. The 2014 YZ450F is 45mm lower than the 2013 bike. Head angle. The 2014 head angle is 27.08 degrees, while the 2013 model’s head angle was 26. 95 degrees. Steering head. The steering head tube has been moved back 10mm from last year, which changes the front center (the distance from the crank to the front axle) by 10mm. In layman’s terms, this means that the front wheel is moved back 10mm. Trail. The 2014 YZ450F has 119mm of trail, while the 2013 model had 120mm of trail. Front axle. The front-axle diameter has been increased from 20mm to 22mm for more rigidity, which means that pre-2014 front wheels will not fit. Airbox. The 2014 airbox is 256 percent larger than the 2013 airbox, and the over-the-cage air filter has 35 percent more surface area than last year’s toast-shaped filter. Fuel tank. Fuel capacity has been increased from 1.6 gallons to 2 gallons. WHAT’S NEW ABOUT THE 2014 GEARBOX? Stick with us on this, because it gets a little confusing. Yamaha wanted to close the gap between second and third gears. There were two ways to achieve this: They could raise the gear ratio in second gear, or they could lower the gear ratio in third. Yamaha chose the latter and changed third gear from 18/23 to 20/26. Third gear on the 2013 YZ450F had a 1.278 gear ratio; the 2014 model’s third gear has a lower 1.300 ratio. Perhaps it could be argued that raising second gear would have been a better choice, since most riders don’t use first gear anyway and moving second up would have kept the gaps between third, fourth and fifth the same; however, Yamaha chose to lower third gear, which means that not only is third gear now closer to second gear, it is farther away from fourth. During testing, we noticed that the YZ450F would tend to fall off the pipe on the upshift to fourth. Making matters worse is that Yamaha changed the primary gear in the 2014 YZ450F gearbox from 23/61 to 23/60. This means that the primary gear ratio went from a lower 2.652 to a taller 2.609, raising the overall gear ratios of every gear. Obviously, this did very little to help the gap between third and fourth.