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Re: Absolute top speed of stock unit-500cc T100? #147245 08/26/08 11:03 pm
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Skeet Offline
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Can't confirm BSA flights with a road test, but here's another from Cycle February 1967 on the Daytona. Claimed 14.9 ET @ 88mph. Complete fodder, but the editors did rant & rave how nice these were.

[Linked Image]

Skeet


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1964 Hornet
1970 TR6R
1971 Norton
1972 XLH
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Re: Absolute top speed of stock unit-500cc T100? #147246 08/27/08 2:28 am
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Hmm. Throwing BSAs from airplanes. What a lovely idea!

Re: Absolute top speed of stock unit-500cc T100? #147247 08/27/08 2:55 am
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Trophy500 Offline
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Quote
speed at the termination of 1/4 mile of acceleration.
Ah, I see. Thanks.
For what it's worth, if my speedometer is to be trusted, the top speed on my relatively well tuned, but unrestored T100C (single carb, with WR gearing) seems to be about 85 mph. There might be a little more on top of that, but not without risk of reaching "terminal speed" in yet another context. (For both me, and my bike.) In any case, I'm going with the early responders and guessing a well-sorted "real world" street Daytona with a ballsy rider could do another 15-20 mph better than that. (At which point it stops being a question of how fast you can go and starts being about how fast you can stop.)


1968 T100C
Re: Absolute top speed of stock unit-500cc T100? #147248 08/27/08 10:47 am
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Skeet,

With a test weight of 535lb they must have had the depleted uranium crank and cams in there. eek beerchug


1971 Triumph T100C
1974 Honda XL350
1982 Suzuki GS750T
2000 Honda VFR800FI
Re: Absolute top speed of stock unit-500cc T100? #147249 08/27/08 2:23 pm
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Skeet Offline
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GS750,
Cycle Worlds test weight was 531 lbs, although they clarified things a little better by stating that this was with a half tank of fuel and rider. I find these old road tests entertaining if nothing else although, when doing a restoration the pictures can be quite helpful. They used to be called on the tech specs. fairly frequently. Cycle World was by far the better of these 2 magazines at that time and were really one of the few sources we could go by. I'm sure they helped sell thousands of bikes. Oh, and by the way here is a real "Flying" BSA.

[Linked Image]

Bugsy Won
Skeet


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1964 Hornet
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Re: Absolute top speed of stock unit-500cc T100? #147250 08/27/08 11:00 pm
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Love it!!


Regards

Grant
Re: Absolute top speed of stock unit-500cc T100? #147251 08/31/08 12:46 am
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Matthew in TO Offline OP
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Thanks everyone. I'm going to take the bike out for an early run tomorrow, looks like a nice day in southern Ontario for once.


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? #147252 08/31/08 7:15 am
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A bit off track from std T100's but how fast did the works Daytona's go at Daytona in the late 60's with Doug Hele at the helm?


1950 Speed Twin outfit
1951 Thunderbird outfit (76 degree racebike, or is it 90 deg now?)
1955 BSA D3 minibike outfit
Triumph solo's
Re: Absolute top speed of stock unit-500cc T100? #147253 08/31/08 11:44 am
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Jeez; After Matthews nice thank you, I thought we were all done. Anyway another road test. laugh

[Linked Image]

To answer your question though, IMO 1966 was Triumphs best year down there. Buddy Elmore slayed the giants. He qualified 46th, at 122.226 and then went on to win. Super stuff. Gary Nixon carried on to win in 1967. By 1968 there speeds were off almost 15mph from the top qualifyers, although Skip Van Leeuwen managed to hit 135.931 with Nixon right behind at 135.501. There's that magic 135 number mentioned previously. :bigt:
Skeet


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1964 Hornet
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1971 Norton
1972 XLH
Re: Absolute top speed of stock unit-500cc T100? #147254 09/01/08 3:06 am
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I had a great ride today. Woke up at 7am, and by 8am was zooming up highway 404 in Ontario from Toronto to Lake Simcoe. There was almost zero traffic. Suitable convinced that I was cop free, I decided to see how fast my 1969/70 single carb T100S would go.

I do not have working speedo unfortunately, however I was able to pace myself by the few cars on the highway, where the normal car speeds are between 125 and 130 kph.

In 4th gear my bike would not exceed 6,500 rpm except going downhill, where 7,500 rpm was indicated briefly. I'd have to estimate that my top speed in forth gear was about 140 kph (87 mph) or slightly less. Mind you, with my full leathers on, I weigh about 220-225 kg. so perhaps my mass was keeping away the ton.

It's a funny sensation to be in top gear with the throttle wide open and nothing more coming on the power. To reach that point in a car or modern bike, I'd be pushing 200+ kph. That's the thrill of old Brit bikes, in that you can have a blast at moderate top speeds where you'd be bored on a modern machine.


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? #147255 09/01/08 5:37 am
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220kg=484lbs! Time to trade up to a 650! laughing


1950 Speed Twin outfit
1951 Thunderbird outfit (76 degree racebike, or is it 90 deg now?)
1955 BSA D3 minibike outfit
Triumph solo's
Re: Absolute top speed of stock unit-500cc T100? #147256 09/01/08 2:39 pm
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Whoops, make that 220 lbs. I'm a "victim" of Canada's half completed conversion to metric in the 1970s. Here in Canada, most weigh themselves in pounds, drive in kilometers, buy eggs by the dozen (instead of by units of ten in Europe), buy lumber by the inch and yard, measure liquids by milliliter, measure their height by inches, buy gas for their cars by liter, but buy tires for their cars measures in inches.


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? #147257 09/01/08 3:30 pm
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now,I know that top end will vary on the same bike from rider to rider and other than experience and balls, The variable that most affects performance is the power to weight ratio ( put me on ANY bike and it will go WAY up!!) as I at present tip the scales at 250 pounds!

So the same bike a little guy of 120 can urge up to 100 mph might not make it with my big hairy rump on board

Re: Absolute top speed of stock unit-500cc T100? #147258 09/01/08 5:11 pm
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For top speed, it's not the mass of the rider (given appropriate tire pressures) but the frontal area of the rider that matters. For acceleration, however, rider mass is inversely proportional to acceleration.


"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin
Re: Absolute top speed of stock unit-500cc T100? #147259 09/01/08 6:13 pm
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Matthew in TO Offline OP
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Surely, given the same machine, a lighter rider will achieve a greater top speed, especially up any grade?


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? #147260 09/01/08 7:37 pm
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Weight is not a factor in top speed, just in acceleration. Air resistance, however, is a major factor.

Re: Absolute top speed of stock unit-500cc T100? #147261 09/01/08 8:27 pm
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Obviously I'm not a physics man, but I can't believe that if I had four 100 lbs. weights in my saddle bags, that all other things being equal that they won't slow me down?


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? #147262 09/01/08 8:33 pm
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Well, if you're going level, there's nomuch in it. Uphill slower, downhill faster - capiche?

Blapper redwine

Re: Absolute top speed of stock unit-500cc T100? #147263 09/01/08 10:11 pm
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"A bit off track from std T100's but how fast did the works Daytona's go at Daytona in the late 60's with Doug Hele at the helm?"
The answer to that is Triumphs claimed 128mph.
A couple of years later I built a Triton for racing using the basic Daytona motor with all the best "go faster" goodies I could find in Britain and America plus a few other bits made or modified by my toolmaker partner and of course a full racing fairing and all the road going bits and pieces removed. It revved to 9500rpm and was electronically timed at one of our local racetracks at 132mph. Although we had a few good results, lack of sponsorship meant that our racing career only lasted one season and the Triton was detuned and returned to road use. Don.TT600.


don1
Re: Absolute top speed of stock unit-500cc T100? #147264 09/02/08 1:21 am
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Matthew in TO Offline OP
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At the recent vintage motorcycle racing association race at Mosport Raceway in Ontario, Canada I saw a 500cc T100 unit engine in a Trident frame. I didn't get a chance to talk to the owner, but I was told it could rev well above 10,000 rpm.


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? [Re: Matthew in TO] #600984 05/24/15 2:18 pm
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Matthew in TO Offline OP
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Rode Ontario hwy 401 at 6am this morning from Newcastle to Toronto, a distance of 35 miles or 57 kms. At 6am on Sunday there was no one.... so as I cruised at 110 kph, I opened her up for a minute. Flat out, throttle to the stop in fourth I reached 135 kph (83 mph) as indicated on my gps (the Smiths speedo in 6-8 mph slow). That's with my 230 lbs (including atgatt) and 30-40 lbs. of luggage. Road wasn't flat, with some slight hills. I don't remember the revs, but I remember thinking the motor wasn't reving really fast but that there was nothing left.... I suspect downhill I could get another 5 mph out of it, so I'll call my top speed at about 90 mph.

Last edited by Matthew in TO; 05/24/15 2:21 pm.

1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? [Re: Matthew in TO] #600994 05/24/15 3:00 pm
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How fast will it go?

As my dad said,

"Fast enough to get you killed."

Re: Absolute top speed of stock unit-500cc T100? [Re: Irish Swede] #600999 05/24/15 3:20 pm
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Matthew in TO Offline OP
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Originally Posted by Irish Swede
How fast will it go?

As my dad said,

"Fast enough to get you killed."
True, same thinking had me tune it back after about 30 seconds or so. Though the dealiest thing remains time itself, it gets everyone eventually.


1982 Suzuki GS650G
Re: Absolute top speed of stock unit-500cc T100? [Re: Irish Swede] #601005 05/24/15 4:15 pm
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Originally Posted by Irish Swede
How fast will it go?

As my dad said,

"Fast enough to get you killed."


"My bike will only do 90 mph."

"That's fast enough when you fall off!"


Amateur Loctite enthusiast.
Re: Absolute top speed of stock unit-500cc T100? [Re: Matthew in TO] #601241 05/25/15 10:58 pm
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I believe Matthew that your method of trying to go as fast as possible on this bike is flawed.
Instead of "opening her up" during cruising you should go to third gear and open her up.
After reaching max speed on third you change to fourth and open her up again.
I believe your revs cruising around 100 kph weren't really higher than 4500/5000.
But because of the gearing your torque was not enough to reach higher speed.

By the way if you long for speed I can sell you my Suzuki GS1150 I used for riding before turning to English bikes. Took it today for a short spin and this bike scarred me to death with it's weight, length and brutal power available in every moment, on every gear smile

https://www.youtube.com/watch?v=5Ce-9n3M_Qc
https://www.youtube.com/watch?v=sj-AKbMIzDo

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