Sorry, curb weight on the 68 (note the year) Commando 750S is 395
as tested by Cycle Magazine. And you don't carry more than 122
HP. The Norton was like the Duke 993, race ready out of the box
where yours would have to have a ton of things done to it to get
it ready for race.
>
> Better frame and forks (and rear suspension) than modern
> sport-bikes? Really?
The Forks and Frame were often modded to fit all sorts of bikes
for racing. And this was for Unlimited NON Stock Classes. That
means, Monsters.
>
> And drum brakes versus modern disc brakes? Really? And let us not
> even go into how much better tires are available for the CBR.
>
> Any cite for the 122-HP claim (which would be amazing for a OHV,
> air-cooled, 4-stroke, 2-valve/cylinder, under-square (73 x 89 mm
> bore and stroke), 9.0:1 compression ratio, Amal carburetors,
> 745cc parallel twin made with the metallurgy available in the
> late 1960's)? Also, published tests indicate top speeds of about
> 110-115 mph for the standard Commando and 120-125 mph for the
> Commando S, which is much slower than the top end of ~157 mph for
> the CBR600F4i (a fair indication of real horsepower).
You read the Brochures I see. In 1967 when the 68 was
introduced, bikes were limited in not only HP but top speed.
Many bikes that were imported had a much higher rating in both
cases than the brochure. Well, all except the CB750 which was
rated higher than it really was.
Most of the Cites today are gone for good. Many Cycle Mags went
out of business before the internet. I haven't seen a decent
replacement that Dynos out the Bikes in more than 3 decades.
It's like buying the fuel mileage rates of cars. (They are never
really tested). And the lawsuits that are going on now over one
"Hybrid" that can't make those claims on a good day and a tailwind.
The Test on the Norton was done on a dyno. At the rear wheels.
They also tested the 55 hp CB750 Honda at 45 hp. They also
tested many other bikes including the HD1200 (disqualified for
ported and polished heads), Kawasaki 500 (tested less than 45 HP
with the lowest torque, they put it back on the trailer and left
it. Never bring a knife to a gun fight), the Brand New Triumph
Trident, tested over 90 hp. (the trident/Rocket3 are listed as
the First Modern Superbike). The results of the test mirrored
closely the 1968 through 1978 Isles of Mann Unlimited Production
Class in results. In 1976, the 68 Norton Commando 750 S was no
longer allowed to compete due to it's age. Norton had gone to
the 850S which was laden down with smog crap by then and killed
the bikes performance. Plus, the 850 grew by over 100 lbs. What
you see in this paragraph is the death of two of the leading
Motorcycle Production Companies that didn't survive into the 80s.
Not because the product wasn't good enough but that they
changed their monsters into cream puffs or couldn't make up their
minds on what to produce. Both went under nearing 1980. The
Cheaper, slower, louder Japanese Bikes started making their way.
To be specific, those bikes based largely on the CB750K. And
the Honda 750 was way detuned most of the time and was a better
motor than originally tested.
Getting those two companies out of the way allowed the Japanese
to begin their dominance. Not to fear, Ducati has been beating
up the Japanese Bikes all along with the Desmadromal Engined 350s
and up for a very long time. When the 350 Duke met the Kawa 500
first at Isles of Man, the Duke trounced it and when you see a
Duke 993, leave it alone today, he's race prepped from the
Factory (Change the oil, change the filters and go racing).
>
> I can find several published dyno tests [2] for the CBR600F4i
> which indicate 95-98 HP at the rear wheel, which means about
> 107-110 HP at the crank. And the Honda does not leak oil, and
> they do not seem to blow up either, even when abused by squids.
In 1968, if you bike stopped leaking oil, you were out of oil. :)
>
> I think someone has been telling you myth and lore [3] about the
> Commando S.
Nope, the mags that did the actual rearwheeled dyno test of the
68 Norton Commando S has long since gone by the way. Today, most
Writers are too lazy to do the work themselves or won't spend the
bucks for the proper tests. The figure of 122+ at the rear
wheels is accurate.
>
>> And before 1968, there was the Vincent Black Shadow. Of course,
>> the
>> Black Shadow may have been powerful, manueverable, quick but it
>> couldn't
>> stop to save it's own life. Well, you get 1 out of 4 on that one.
>>
> Anyone actually run the Black Shadow hard on the track against a
> modern super-sport, with documented results? Of course, this is a
> generally daft idea on any bike that age (which is why vintage
> racers tend to be mostly reproduction parts that have not
> suffered from inevitable metal fatigue from use and other factors
> that weaken old parts).
No one takes a Black Shadow much over idle these days. There are
so few left. It's a legendary Bike from the 40s designed in the
early 40s. And it was hand built designed to be worked on by the
riders. Less than 1700 were manufactured, all hand made.
>
> Or does the Vincent also have a reputation that exceeds reality?
> Best in the world in 1950-something does not mean anywhere near
> the best in 2010-something.
Hate to break it to you but your 600 is not even close to being
world class. I suggest you avoid any Duke 993 that comes your
way. Now, HE'S world class.
>
>> But on the 68 Norton Commando, you are still chasing it in ALL
>> Categories. The other racers in the Isle of Man sure were happy
>> when the
>> 68 was no longer able to run in the Stock Unlimited class due
>> to the
>> year allowance.
>>
> Cite any racing results of the Commando against any super-sport
> bike built in the 21st Century?
Not going to happen. Today, the 68 Norton 750S Commando is
considered a collectors bike. No one in their right mind would
ride them like that anymore. Parts aren't to be had if you break
them.
>
>> The fact remains, like the 68 Norton, your CBR600 is still too
>> much bike
>> if you push it. The only difference here is that the 68 Norton
>> kills you
>> quicker.
>
> The CBR600F4i is not too much bike for a skilled rider (not
> necessarily me) on a track.
>
> The Norton will kill a person faster due to its suspension,
> braking, and frame being four decades behind that of a modern
> super-sport bike.
It dominated racing in a time where speed and fuel limits didn't
exist. MC Racing has slowed down a bit to keep from killing as
many riders.
>
> [1]
> <
http://www.motorcyclespecs.co.za/model/norton/norton_commando_750s%2069.htm>.
1970 Norton didn't have the muscles of a 67/68 Norton S. And I
question anything where the Data is incorrect. According to the
Author, the Commando S was introduced in Mar 1969 when it was
clearly introduced in Sept 1967. So far, all the "Writers" out
there all claim that they rode the commando S and all used the
Sales Lit as their Dyno and Road Test but they kept the bike
inside the legal speed limit. Tells me a heap of something here.
Doesn't mean a thing. The only way that a real comparison can be
done is the way they did it in 1968 and that is a head to head.
Paper lies, pavement doesn't. And that's not going to happen
since the 68 Norton Commando 750S is now a collector. It's like
taking an Original Ford GT40 out to race it even if it's
competitive even today. No one does that. You break it, it
stays broken until a new part can be fabricated to replace the
original part which lowers the worth of the original.
In 44 years, no one will remember your 600 or your 700. Both
will be consigned to be recycled long before that. But the
Norton Commando 1968 750S will still be in shows and sought
after. That is the mark of greatness.