Topic: What is your 0 - 60 time for 750

[aminemed]

Hi all

I know that this subject was brought before, but even though i spent a lot of time looking for an answer, i was not able to found one. What is your 0 - 60 mph time ? for CB 750 owners

[FuZZie]

Motorcyclist, August 1972
CB750K2
14.059 @ 95.03

from: Reply #7 compares the posted 1/4 miles by different magazines if it helps.
http://forums.sohc4.net/index.php/topic,81630.0.html

The attachment in Reply #12 says 5.2

[Sam Green Racing]

Aminemed, due to the fact that you are likely to get lots of different answers, can I ask you why, does it really matter.

Sam.

[aminemed]

it is really personal...i'm really wondering what is the average time a cb 750 is achieving this. I know that it cannot be compared to today sportbikes. I'm into vintage bikes because they have something special. Having this benchmark in my head provides me with more info on these bikes.

[slikwilli420]

Get on your bike and time yourself. Or go to a drag strip and see what you can come up with. What it was 40 years ago is hardly relevant now. Do a 3000 mile check up and get some times as a baseline.

[aminemed]

why do you speak about what was 40 years ago ? im asking people who timed themselves recently...to gather some benchmark and stats..

[slikwilli420]

Yeah, you didn't make that even remotely clear in your original post.

[aminemed]

ok changed it

[FuZZie]

why do you speak about what was 40 years ago ? im asking people who timed themselves recently...to gather some benchmark and stats..

Yes, but they would be extremely skewed compared to yours .... especially in this forum!

[aminemed]

i maybe have a super racing bike with great stats..don't judge too fast..

[FuZZie]

I'm not judging, but even if they post up time's your not going to be comparing apples to apples. Now if you have kitted up the bike or even plan on it this would be the place to post it and ask for advice. If you have numbers in mind they could suggest what path you need.

[754]

Probably the 4 sec range for a good strong stocker, with good rider. Tough to get them in the 12 second range.
Unless you have dragraced a lot before, don't be surprised if you cant match that..
Now 60 ft times there are a few on here, at the 1.5 Mark or just under.. but those are 10 second bikes..

[dragracer]

Other than road racers on this site, i'm not certain who at this point measures performance of our older bikes in 0-60 second times. I can offer you a view of one of my quicker drag  strip time slips but it only references 60' and other incrementals. We're mainly concerned about 1/8's mile and 1/4 mile times since those number are easier to compare to other bikes set up in similar fashion. That 10.34 passs is not my normal ET. I dial slower for consistency sake.

I hope you can find someone to help answer your question.

[simon#42]

road racers have no interest in speed only lap times ,  well the good ones do .

[seanbarney41]

yeah, 0-60 mph times are not really that pertinent to the motorcycle world, more of a car thing.  As in drag racing, a really good 0-60 time requires a rider that knows how to launch the bike.  This is really hard to do, especially on a cb750 that has healthy power but not much down low in the rpm range.

It's been a few years since I have been to the drag strip.  Last time I went it was a bike only special event that was more of a Harley rally than a serious race.  I just went because it was $20 to race all day and  few were racing so I got as many runs as I could stand, which was LOTS!  My first run was in the high 14's, by the end of the day I was in the high 13's but I never really had any even half respectable reaction times.  My bike was not set up for drag racing at all, more of a back roads blaster...stripped down to about 470 pounds, k5 with fairly worn out k8 engine with 17 front/46 tooth rear sprocket, hitting 90-95 mph in the quarter...The bike held up awesome!  I was basically taking a run, grab timeslip, cruise on back, take another run with no wait staging for about 2 hours straight.  So Much Fun

[Stev-o]

My K4 is an 836 and is SLOW!  [compared to modern bikes and cars]

[seanbarney41]

Steve-O, think your vette can beat your 836?

[dragracer]

road racers have no interest in speed only lap times ,  well the good ones do .

Even I should have known better than to make that statement, oh boy. Yeap, lap time only. So I'll retract my statement and say I don't know of any motorcycle racers that pay attention to 0-60 mph times.

[bwaller]

 

[754]

 I actually have never seen a place we could measure it.. it's standard practice in magazine tests, but I have no clue what they use.

[Stev-o]

Steve-O, think your vette can beat your 836?

Ha!  They're both slow, relatively speaking. The wife's 370Z is prolly faster than both.

The 836 is prolly quicker but the Vette is faster [and a pig at over 3700 lbs]...


1970 Chevrolet Corvette Stingray Convertible 350 V-8 Turbo-Fire 300-hp
RWD, 4-speed Muncie gearbox
Gasoline engine with displacement: 349.8 ci, 300 hp / torque: 380 lb-ft
Base curb weight: 3720 lbs
Top speed: 130 mph
Accelerations: 0- 60 mph 7.3 sec
1/4 mile drag time: 15.3 sec


Riding and driving both....priceless!

[FuZZie]

I actually have never seen a place we could measure it.. it's standard practice in magazine tests, but I have no clue what they use.

I don't know about a place, but researching I found some google apps that do it via gps. No idea how accurate though.

[PeWe]

0-60 is not as interesting as 60-120 :-)
Or more useful during normal riding 70-170 kph (43-105 mph).
from 0-60 is more about the riders skill how to take off and shift than the bikes power.

[gschuld]

http://www.apptism.com/social-networking/bunsentech/dynolicious-fusion/

There are apps you can download to your smartphone to allow you to test quite a bit of stuff, including 0-60mph, 1/4 mile, etc.  Just open the app and find a stretch of quiet road.  Repeat/practice as needed to get best results.

You could always get organized and have a bunch of members get the same app for consistency and test their own bikes and share the results in a thread.  Instant bragging rights, just don’t upload the results from your modern crotch rocket and pass it off as your old CB😏...😁

Regarding road racers, 0-60 is important to a limited degree, as in limited to the start of the race and any restart.  They are all standing start races, so the better the holeshot(functionally a 0-60 test) the better position you put yourself in at the first turn.  It’s basically a straight up drag race start with up to a dozen or more other bikes per group staggered in position going off at the same time fighting for position at the first turn. It can make a big difference in a competitive class as a worse than usual holeshot can put you several bikes lower in position at turn 1 than a decent or stellar one.  Fighting to get to the front while trying to get around other bikes isn’t the best position to find yourself in. Road racers just don’t generally measure their holeshot performance in 0-60 terms.

George

[gschuld]

Ok, that said, Frankie (Dragracer) offered a really good example for your question.

The time slip he offered showed both his very fast dragbike(10.3@121mph) AND the numbers for the guy next to him that just so happens to be a fairly average performance for a mid 70s dead stock CB750(14.2 @ 94mph in the 1/4).  So you can get a feel for both ends of the spectrum.

Using http://www.wallaceracing.com/0-60_equation.php

I put in the 1/8mile ET and mph into the calculator for each bike.

9.08 seconds and 78.4mph(14.2 seconds and 94mph 1/4) for the rough equivelant for a stock mid 70s cb750 came out to a 5.32 second 0-60mph time.

6.41 seconds and 103.6mph(10.3 seconds and 121mph 1/4) for Frankie’s 100hp plus big bore dragbike came out to a 2.15 second 0-60mph time😬

These calculators can never be perfectly accurate for obvious reasons, but should be plenty close enough for your needs.

George