Yamaha YZ250F 2020 vs. Yamaha YZ450F 2017

The Yamaha YZ250F model year 2020 and the Yamaha YZ450F model year 2017 are both motocross bikes manufactured by Yamaha. While they have some similarities in terms of their technical specifications, there are also notable differences between the two models.

In terms of the motor and drive unit, both bikes have a single-cylinder, four-stroke engine with fuel injection and kickstart. However, the YZ250F has a smaller displacement of 250cc compared to the YZ450F's 449cc. The YZ250F has a bore of 77mm and a stroke of 53.6mm, while the YZ450F has a larger bore of 97mm and stroke of 60.8mm. The YZ250F also has a higher compression ratio of 13.5 compared to the YZ450F's 12.5.

In terms of suspension, both bikes feature upside-down telescopic forks in the front and a swingarm with a monoshock in the rear. The YZ250F and YZ450F have the same suspension travel of 310mm in the front and 315mm in the rear. Both bikes also have adjustable compression, preload, and rebound settings for the suspension.

Yamaha YZ250F 2020

Both bikes have an aluminum frame with a twin tube design, providing a lightweight and rigid chassis. The YZ250F and YZ450F also have the same front brake diameter of 270mm and hydraulic actuation.

In terms of dimensions and weight, the YZ250F has a front tire width of 80mm and diameter of 21 inches, while the YZ450F has the same front tire specifications. The YZ250F has a rear tire width of 100mm and diameter of 19 inches, while the YZ450F has a wider rear tire width of 110mm. The YZ250F has a wheelbase of 1475mm, seat height of 965mm, and a weight of 105kg. On the other hand, the YZ450F has a slightly longer wheelbase of 1480mm, the same seat height of 965mm, and a slightly heavier weight of 112kg.

Yamaha YZ450F 2017

In terms of strengths, the YZ250F 2020 boasts a series chassis, strong torque, powerful motor, reliable brakes, Powertuner application, mapping switch, and traceability. On the other hand, the YZ450F 2017 has important parts that come as standard, tuning application, excellent response, and a Nissin brake.

As for weaknesses, the YZ250F 2020 has been noted to have a noise from the intake that takes some time to get used to. On the other hand, no weaknesses were mentioned for the YZ450F 2017.

In summary, the Yamaha YZ250F 2020 and the Yamaha YZ450F 2017 are both high-performance motocross bikes with their own strengths and weaknesses. The YZ250F offers a smaller displacement and higher compression ratio, while the YZ450F has a larger displacement and slightly wider rear tire. Both bikes feature advanced suspension, lightweight chassis, and reliable brakes. Ultimately, the choice between the two models would depend on the rider's preferences and intended use.