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I love building old motorcycles and working on them i have always rode old bikes. The kids at school always make fun of what i ride. They all ride new bikes would it be posible to build a cb750 that could take a r6?
 

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I guess you've never ridden an R6, or any modern sportbike.

The difference between a CB750 and a Yamaha R6 is like...
a Ford Model T and this years Ferrari F1 car. Seriously. The 2006 R6 redlines around 16000rpms and makes about 110hp, all from 600ccs. You're CB750 might make.... 60hp at 7000rpms?

Funny what happens with 30 years of development on the sportbike cutting edge. The only way you could "beat" a R6 is on the cafe looks department... and of course, beauty is in the eye of the beholder.
 

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The CB750 is heavier...it would beat the R6 to the ground if you dropped them both out of a plane.

If you threw a CB750 at a Decepticon it would do more damage than an R6.

R6s are everywhere...CB750 cafe bikes are more rare...that's something.
JohnnyB
 

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Who was the dude on the tower of Pisa with the cannonball and the marble? Galileo? Didn't he prove that more mass doesn't fall faster? Does that apply to a CB750 and an R6 at all? Could I ask ANY more questions?
Also, don't let those beaters clown you about riding an old bike. They've got no imagination. You'll have the last laugh when they wrap themselves around a tree anyway.

Z
 

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In a vacume items of different mass fall at the same rate. In the real world masses of different Density fall at different rates due to the resistance of air.

For instance...a balloon and a pea that weigh the same, will fall at the same rate in a vacume, but at a different rate in air...due to the difference in density and aerodynamics.

I figure the extra heavy CB750 would fall faster than the lighter R6...even though the R6 is more aerodynamic. But...I guess if the R6 fell nose first it might win anyway.
JohnnyB
 

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Cycle Xchange claims they can build a 1061cc Sohc (Cb750) motor that will put out 130+ Horsepower at the rear wheel. M3 racing builds Sohcs to 96 rw HP with a 1mm overbore (approx 760cc). They also get their bikes down to something like 375lbs dry weight. I'm pretty sure a 375lb, 130 HP Cb750 would kick an R6's ass (in a straight line at least), but you'd probably be able to buy an R6 for the money spent to get it there. If I was rich I'd do it just to see the look on the R6 owner's face (I'd build a completely stock looking Cb, too). Jimmy
 

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African or European?

JohnnyB

PS. Inflated with vacuum....I can do that with a shop vac attachment :)



Edited by - jbranson on Apr 25 2006 10:12:30 AM
 

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wanna really beat up on an r6 with an old bike??? this would probably work.
supercharged cbx in a spondon frame with a cbr front end!




jc



Edited by - joe c on Apr 25 2006 10:31:46 PM
 

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You'd have a hard time convincing a young kid that that cbx special was an old bike. It looks so modern I doubt if you would get teased about its vintage (even if they didn't know how fast it was). Jimmy
 

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quote:
I love building old motorcycles and working on them i have always rode old bikes. The kids at school always make fun of what i ride. They all ride new bikes would it be posible to build a cb750 that could take a r6?
No....

I have a friend who raced cb750s for 20 years. His garage looks like Russ Collins took a shit on every shelf (points for the people who know who russ collins is). At one point he had cb750 drag bike that ran 9's. this is probably about the fastest I have ever heard a single motored N/A cb750 go. It was bored to 1036ccs, ran race gas (actually nitro) had a dedicated chassis, was maximized fof straight line, and was no where even close to street legal. Also it took all of a two lane road to make a u-turn. Cycle world managed to take a brand new R6 and with a couple of ratcheing tie downs and some dropped dogbones managed to go 9's with a street legal and registered R6.

I have heard about cycle ex's calims and that is for crank HP, somehow a lot more hp will get lost in the cb750's gearbox on it's way to the rear wheel, that is if the cb750 gearbox could handle the power (doubtful). The biggest thing to consider is that a stock cb750 overheats in traffic, a bored cb750 will have a complete meltdown in traffic if stuck long enough. An R6 will sit and idle all day long.
 

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He never said it had to be a brand new R6. And I doubt any high school kid could run as fast as a hired gun at Cycle world. If I ever get rich you'll see. If I have to turbo and nitrous inject the thing and strap rocket boosters to the seat I'll do it just to prove an old Cb750 can kick an R6's ass. Jimmy

P.S. He never said it had to be street legal.
P.P.S. RC Engineering, raced multi-engined Cb dragbikes. Where are my points?
 

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Everybody who knows me knows I eat, sleep, and crap cb750s (the 77-78 K bikes are the hardest to pass). Currently I have 6 bikes from early K's to dunstall Super Sports. I have had or ridden most of the hot setups out there. The point of a cb750 is nolonger to be the fastest baddest muthafucker on the planet, there is something else that the bike delivers that a new r6 or r1 cannot and that is a raw riding expirence.

I have a 1986 ninja 1000R and at 100mph on the slab that bike is boring. It feels stable, sure, the wind isn't even that bad, it is just really boring. On the highway with the cb750 at 80mph the bike is shaking, the engine is scraming at 5grand, it feels at any second as if it could pitch you into a tank slapper. At 80mph you feel like you are going for the land speed record. At 100mph you feel like you are cheating death. It is those feelings, that absolute raw edge that embodies the spirit a cafe racer, the soul a new bike is born without.

The difference between a cb750 and an r6 is the difference between a WWI spad, and an F16. Sure the F16 pilot can fly faster and harder, but only the Spad pilot is truely cheating death in his open cockpit rickety contraption.

The rider will make a difference to a certain point. I have a friend with a new R1. He doesn't know how to push the bike around curves and the chicken stripes on his tires are a mile wide. He gets pissed wheneve he hears my centerstand scraping behind him because he knows I am right on his ass in a curve. I have even managed to pass him on a curve a few times on my 75 Q-ship. However once we get a straight all he has to do is wick it up and he is gone and it takes me miles to catch him again. Unrestricted his bike will do 190mph, mine will do 110mph. If I am doing 2 miles a minute (say I got a good tailwind and am pushing 120mph) he is doing 3 miles a minute. in 2 minutes of running flat out he is 2 miles ahead of me. That is the magic of a new sport bike: Any Tom, Dick, and Harry can throw a leg over and go this speed, all you have to do is pony up the dosh for a power commander and tuck behind the fairing.





Edited by - Geeto67 on Apr 28 2006 1:27:20 PM
 
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