2007 yz450's have around 49-50hp. All engines are different. If you want a hard hitting motor the 2003 yz450 is where you wnat to go. A 2003 model pumps out 49-53 stock. The motors have a high performance cam in them and they hit hard. They will destroy a newer 450 in a drag race anyday. I have all facts from motorcycle usa.com
id say 450...
14.8 horsepower
The 1998 Yamaha R1/YZF-R1 had 150 horsepower and a 5-valve design. When the 2007 model came out, the horsepower had been increased to 180.
Around 130hp
10 billion.
182 HP
according to cycle worlds buyers guide for 08 the Yamaha YZF- R1 has a claimed horsepower of 180 Exact quote "oh yeah, horsepower?" "A claimed 180 at the crank."
One million horsepower!
The Yamaha YZF-R1 generates about 128 horsepower. It reaches 60 miles per hour from zero in 2.96 and has a quarter mile time of 10.31 seconds.
1.13 liters
2,00,000
yzf 450 it handles better and is lighter.