25 years of sportbike development

derf · 08-21-2009, 01:16 AM

http://hellforleathermagazine.com/20...5-years-o.html

Take a look at this interactive graph. It starts in the 80s and shows power to weight through time. Its pretty cool. Botice that it is a pretty steady drop in weight and gain in power until 2005 when the emission standards changed, but even that blip in the other direction was overcome within a few short years

smileyman · 08-21-2009, 10:23 AM

Great find. Yeah every 2-3 years they get two to five percent better, but those are just power to weight numbers, braking, handling, durability, all getting better and better!!!

z06boy · 08-21-2009, 10:27 AM

Crap...blocked at work.

My very first streetbike was a 1988 Ninja 600R...boy I thought that bike was something.

Dave · 08-21-2009, 10:32 AM

mine was an 87 hurricane 600 kindof an eye opener when the 954 was lighter and far more powerful

z06boy · 08-21-2009, 10:38 AM

Quote:

Originally Posted by Dave

mine was an 87 hurricane 600 kindof an eye opener when the 954 was lighter and far more powerful

My friend bought the Hurricane when I bought the Ninja. I have owned two Honda's...94 F2 and 95 F3.

smileyman · 08-21-2009, 10:48 AM

My first racebike was a bonestock 95 F3. Great bike, did lots of sprints and endurance races on em'

Tmall · 08-22-2009, 05:16 PM

I think the next big thing is going to be downforce incorporated into the body work.

They'll make it lighter to help accelerate, then have downforce to stick it to the ground.

Tmall · 08-23-2009, 01:29 PM

Cylinder filling is just about as efficient as it will get.

It has a giant pump pulling the air in. Aside from forced induction, you don't get too much more power from head work.
If all it took to increase tq was to polish your intake ports and have the intake velocities be spot on, wouldn't the manufacturers be doing it?

I suppose decreasing losses would count, suzuki did it on their bikes by reducing pumping losses in the cylinders themselves.

Falls under the law of diminishing returns.

Dave · 08-23-2009, 01:34 PM

i actually was referring to forced induction. and kawasaki already hand finishes their intake ports

Tmall · 08-23-2009, 01:36 PM

Gotcha.

Forced induction mimics higher displacement.

08-21-2009, 01:16 AM	#1
derf token jewboy Join Date: Nov 2008 Moto: CBR 900, KLR ugly ass duckling, Gas Man Posts: 10,799	25 years of sportbike development http://hellforleathermagazine.com/20...5-years-o.html Take a look at this interactive graph. It starts in the 80s and shows power to weight through time. Its pretty cool. Botice that it is a pretty steady drop in weight and gain in power until 2005 when the emission standards changed, but even that blip in the other direction was overcome within a few short years __________________

08-21-2009, 10:23 AM	#2
smileyman White Trash Hero Join Date: Mar 2008 Location: NW Arkansas Moto: Buell 1125R Porco Rosso Edition Posts: 4,895	Great find. Yeah every 2-3 years they get two to five percent better, but those are just power to weight numbers, braking, handling, durability, all getting better and better!!! __________________ Arkriders.com To be the best you must first be willing to risk the worst!

08-21-2009, 10:32 AM	#4
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	mine was an 87 hurricane 600 kindof an eye opener when the 954 was lighter and far more powerful __________________ TWF Post whore #6

08-21-2009, 10:48 AM	#6
smileyman White Trash Hero Join Date: Mar 2008 Location: NW Arkansas Moto: Buell 1125R Porco Rosso Edition Posts: 4,895	My first racebike was a bonestock 95 F3. Great bike, did lots of sprints and endurance races on em' __________________ Arkriders.com To be the best you must first be willing to risk the worst!

08-23-2009, 01:34 PM	#9
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	i actually was referring to forced induction. and kawasaki already hand finishes their intake ports __________________ TWF Post whore #6

08-21-2009, 10:27 AM	#3
z06boy Letzroll Join Date: Feb 2008 Location: Lake Norman area, NC Moto: 07 Red R1 & 07 Blue R6 Posts: 5,265	Crap...blocked at work. My very first streetbike was a 1988 Ninja 600R...boy I thought that bike was something.

08-22-2009, 05:16 PM	#7
Tmall Aspiring Rapper Join Date: Nov 2008 Location: Halifax, NS Moto: '12 CB1000R Posts: 3,569	I think the next big thing is going to be downforce incorporated into the body work. They'll make it lighter to help accelerate, then have downforce to stick it to the ground.

08-23-2009, 01:29 PM	#8
Tmall Aspiring Rapper Join Date: Nov 2008 Location: Halifax, NS Moto: '12 CB1000R Posts: 3,569	Cylinder filling is just about as efficient as it will get. It has a giant pump pulling the air in. Aside from forced induction, you don't get too much more power from head work. If all it took to increase tq was to polish your intake ports and have the intake velocities be spot on, wouldn't the manufacturers be doing it? I suppose decreasing losses would count, suzuki did it on their bikes by reducing pumping losses in the cylinders themselves. Falls under the law of diminishing returns.

08-23-2009, 01:36 PM	#10
Tmall Aspiring Rapper Join Date: Nov 2008 Location: Halifax, NS Moto: '12 CB1000R Posts: 3,569	Gotcha. Forced induction mimics higher displacement.