buy a different bike, I did. bought a husaberg with a happy button and all is well.
You have to determine the cause before you can fix it.
The 2005 YZ450F (third generation) had just over 52 HP
Check your fuel lines for a leak.
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
236 mph
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.
125mm
i would say around 80-90mph
80-100 mph
I topped out my yz 450 at 110mph. with just a few modifications