Yamaha 2004 FZR-R1 WOW, that's some enginering.

"It begins with a third-generation, 998cc, liquid-cooled, short-stroke, 20-valve, in-line four-cylinder engine designed to make 180 horsepower power at a stratospheric 12,500 rpm. The shorter cylinder head is re-angled farther forward to 40 degrees, far enough forward to allow the main frame spars to go over the engine instead of around it. "

 

that is awesome, but my buddies FZR-R6 lays 115hp to the rear tire. Thats closer to 200hp/liter, and he gets to spin it to like 16k

He was just at Daytona for the superbike stuff. Did very well. that bike only weighs 320lbs too . He was seeing 170+mph on the straight.

 

15,5K Redline on the R6. My favorite bike I'm in the market for one...

 

I built a VF500 once that got 78rwhp@13,500rpm... Didn't last long though...

 

what is the hp loss from rear wheel to crank on bikes???

Because "buddies FZR-R6 lays 115hp to the rear tire. Thats closer to 200hp/liter" is over a 40% loss!!!!

 

I've seen figures of around 8-10% for bikes. A well-lubed O-ring chain is highly efficient at transmitting power, something around 98-99%. The majority of the loss is in the gearbox on bikes. So..

"my buddies FZR-R6 lays 115hp to the rear tire."

115hp / 0.90 valvetrain loss / 0.6L = 213hp/L

The thing with the Japanese bikes is that there was this voluntary gentleman's agreement between the manufacturers to limit power. So they all quote figures like 135bhp across the board. Looks like Yamaha is breaking the truce.

 

My blackbird supposedly produces 154hp at the crank with 135hp rwhp, as the gentlemen agreed . It's damn fast.

There's been another informal truce by the manufacturers this year and last- top speed limits. All the big superbikes seem to settle in around 185. My fastest speed verified by GPS was 178. ...

Here's a few images from the Blackbird forum from riders that have flaunted the gentlemen's agreement to hit some wicked fast numbers.












There's debate about the last one being photoshopped. It's possible to get to 199 but not without mods like a turbo or nitrous

 

Remember, the R6 is 599cc (1/2 ltr) so 115 is over 200hp/ltr. The only thing about the 600s is you have to rev the **** out of them to get the power. I rode an F4i not to long and it was rather boring until about 9k.

I prefer the big twins (TL1000, VTR1000, SV1000, or RSV1000). Or any Honda V4.

Give me Torque or give me Death.

I prefer the street friendliness of the twins.

 

With the Hayabusa, there was one tuner that opened the intake by modifying the airbox flap valve and new exhaust. He hit 200 without engine mods.

 

April 04 Sport rider has a feature on Lee Shierts doing a 250.00694 (yes, 4 digits) mph Busa run. It's turboed, running 20psi boost. He said getting up to speed was fine, slowing down was the risky part.

Luckily for us XX owners the busa makes a 951 look damn reliable

 

My buddy had a 97, IIRC, TL1000 and it was bad ***!!