The Yamaha YZ450F is designed primarily for Motocross and off-road performance, with a displacement of 450cc. While you can make modifications to increase horsepower and torque, such as adding a high-performance exhaust or tuning the ECU, there are limits to how much performance you can realistically extract without compromising reliability. Additionally, any modifications should comply with local regulations and safety standards. Overall, the bike's design inherently caps its maximum potential size and performance.
The 2005 YZ450F (third generation) had just over 52 HP
about 90
52
Well if you look at it in the science way then it is obiously 2012 yz250 but the way that other people look at it then it is 2012 yz450f
The Yamaha Motor Company produces the YZ450F. This is a type of motocross bike. It is widely credited to be the bike that started the four-stroke bike revolution.
236 mph
if every thing is the same it will look it over carfully and make sure it fits
i would say around 80-90mph
125mm
I topped out my yz 450 at 110mph. with just a few modifications
80-100 mph
120mm level