My friend was on the Yamaha showcase in Europe http://www.demodderberen.be/yfz450/yamaha_yzf450.htm

He said it has 48 HP on the wheels !!! It can beat every other ! Only in top speed KFX 700 is faster.

 

Ah......... The Raptor and DS650 are faster than a kfx700. And I'll bet almost for sure that the yfz450 will stomp the DS650 and Raptor so where in the hell are you comming from that the kfx700 will beat it in top speed? Learn the facts before posting what you don't know. If you dont believe me just ride a yzf 400, 426, or 450 once and get back to me what you think is faster.

 

40rwhp is my guess...

 

I don't think the YFZ450 will beat a raptor, in the sand anyhow, your just tossing way to much sand...... I think on the track it will MAYBE beat the raptor but I don't think it's going to pull as hard as the rappy does from the bottom to top......

 

The "ATV Sport 2002 Buyers Guide" states that the Cannondale Cannibal 440 has a SAE Horsepower of 37.9, 400EX@26.5, Banshee@40.5, Raptor@34.3. I really don't have a clue but I'm going to guess that the YFZ 450 will have around 36 HP.




SykoQuadRider-- I don't think Yamaha had to hurry to get something out before Honda. Honda doesn't seem to be moving too fast. [img]i/expressions/face-icon-small-smile.gif[/img]

 

I quessing no more than 44 ...but i read somewere by just putting on a different muff, ripping of the airbox , and jetting adds 20% more power! It did get detuned somewhat, intake cam is yz exaust is wr, has less compression, destroked, and most likly a throttle stop. Hope it lives up to the hype..... putting a deposit on one tomorrow![img]i/expressions/face-icon-small-cool.gif[/img]

 

WR450F-449cc, BxS-95x63.4mm, Comp.-12.5:1, Carb.-39mm, Trans.-5spd.
YZ450F -449cc, BxS-95x63.4mm, Comp.-12.5:1, Carb.-39mm, Trans.-4spd.
YFZ450 -439cc, BxS-95x62, Comp.-11.9:1, Carb.-39mm, Trans.-5spd.

 

With a stock piston of 11.9 im shooting for 38 to 40

 

35 hp @ the rear wheels

 

43.32356214387 HP as long as chain is adjusted correctly.