Yamaha YZ250F 2020 vs. Yamaha YZ450F 2017

The Yamaha YZ250F 2020 and the Yamaha YZ450F 2017 are both motocross bikes designed for off-road racing. While they have some similarities in terms of their technical specifications, they also have distinct differences that set them apart.

Starting with the engine and drive train, the Yamaha YZ250F 2020 has a bore of 77 mm and a stroke of 53.6 mm, while the Yamaha YZ450F 2017 has a larger bore of 97 mm and a stroke of 60.8 mm. This means that the YZ450F has a larger displacement of 449 ccm compared to the YZ250F's 250 ccm. Both bikes have a 4-stroke engine and fuel injection systems, providing efficient and reliable power delivery.

In terms of suspension, both bikes feature upside-down telescopic forks in the front and swing arm suspension with a monoshock in the rear. They also offer similar travel distances and adjustment options for compression, preload, and rebound. This ensures a smooth and controlled ride over various terrains.

Yamaha YZ250F 2020

The chassis of both bikes is made of aluminum and features a twin tube frame design, providing strength and stability. The braking systems on both models consist of hydraulic-operated front brakes with a diameter of 270 mm. This allows for responsive and powerful braking performance.

When it comes to dimensions and weights, the Yamaha YZ250F 2020 has a slightly shorter wheelbase of 1475 mm compared to the YZ450F's 1480 mm. Both bikes have the same seat height of 965 mm, which may be a bit high for some riders. The YZ250F weighs 105 kg, while the YZ450F weighs slightly more at 112 kg.

In terms of strengths, the Yamaha YZ250F 2020 boasts a series chassis, providing a solid and stable platform for aggressive riding. It also has good torque and engine performance, allowing for quick acceleration and power delivery. The bike is equipped with a Powertuner App and Mapping Switch, allowing riders to customize their engine settings for different track conditions. Additionally, the YZ250F has good trackability, meaning it handles well and is easy to control.

Yamaha YZ450F 2017

On the other hand, the Yamaha YZ450F 2017 has the advantage of having important parts that are standard, meaning riders don't need to invest in aftermarket upgrades. It also features a tuning app that allows riders to fine-tune their bike's performance to their preferences. The YZ450F has a great response and is known for its powerful and responsive engine. Additionally, it is equipped with Nissin brakes, which are known for their high-quality and reliable performance.

As for weaknesses, the Yamaha YZ250F 2020 has been noted to have some intake noise that takes some getting used to. However, no specific weaknesses were mentioned for the Yamaha YZ450F 2017.

In conclusion, the Yamaha YZ250F 2020 and the Yamaha YZ450F 2017 are both capable motocross bikes with their own strengths and weaknesses. The YZ250F offers a more compact and lightweight option with good torque and trackability, while the YZ450F provides a more powerful and responsive ride with standard important parts and a tuning app for customization. Ultimately, the choice between the two will depend on the rider's preferences and specific needs.