The YZ450FX comes with a world championship winning heritage. Our engineers draw on the highest level of competition for inspiration & innovations. From engine design to suspension to exterior styling, the racing performance & presence of our YZ models can be found throughout our entire competition model lineup.
At the heart of the YZ450FX is our proven YZ450F rearward slanted, “reversed” fuel injected engine featuring cross country oriented tuning. Electric starting is a feature many riders will appreciate and along with its wide ratio transmission, adds serious versatility to the largest member of our “FX” family. Whether competing in cross country events, vet motocross, ice racing or even snow biking, the FX is a winning choice.
Compact “Bilateral Beam” aluminum frame centralizes mass for exceptional handling & light weight manoeuverability. By centralizing mass, our engineers have produced a machine that feels and handles more like a 250. Add in our YZ based, easy to tune KYB “SSS” suspension and your trophy case just might need an extra shelf.
|4-stroke, Liquid-cooled, DOHC, 4-valve (titanium), single|
|Bore and Stroke|
|97 x 60.8 mm|
|Keihin 44mm throttle body F.I.|
|Ignition / Starting|
|TCI / Electric|
|Wide ratio 5-speed transmission|
Primary ratrio 2.609 (60/23)
Secondary ratio 3.846 (50/13)
1st gear 2.417 (29/12)
2nd gear 1.733 (26/15)
3rd gear 1.313 (21/16)
4th gear 1.050 (21/20)
5th gear 0.840 (21/25)
|Adj. 48mm, inverted fork / 310mm (12.2") wheel travel|
|Fully adj. Monocross / 318mm (12.5") wheel travel|
|270 mm, floating disc / twin piston caliper|
|245 mm, disc / single piston caliper|
|7.5 litres (1.7 Imp. gal.)|
|119kg (262 lb)|
|Yamaha Racing Blue|