SuzukiSavage.com - Ducati....112 mph, 350cc single?

Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28642 Tucson Az Gender:	Re: Ducati....112 mph, 350cc single? Reply #15 - 03/31/15 at 17:58:58 It seems to take about 40hp to get a bike up to 100mph... 30hp will get you to 90,... 20hp will get to about 75mph... 22hp will do the ton off a cliff...(if you tuck)... ...
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: Ducati....112 mph, 350cc single? Reply #16 - 03/31/15 at 19:27:46 93 if you don't tuck?
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Art Webb Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3007 columbus, Texas Gender:	Re: Ducati....112 mph, 350cc single? Reply #17 - 03/31/15 at 19:39:40 Serowbot wrote on 03/31/15 at 17:58:58: It seems to take about 40hp to get a bike up to 100mph... 30hp will get you to 90,... 20hp will get to about 75mph... 22hp will do the ton off a cliff...(if you tuck)... ... not so fast, a Rebel has 16 HP, and it'll do 75-80
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gizzo Serious Thumper Offline SuzukiCabbage. It's Savage. Posts: 1318 Australia	Re: Ducati....112 mph, 350cc single? Reply #18 - 03/31/15 at 21:03:22 Serowbot wrote on 03/31/15 at 17:58:58: It seems to take about 40hp to get a bike up to 100mph... 30hp will get you to 90,... 20hp will get to about 75mph... 22hp will do the ton off a cliff...(if you tuck)... ... Assuming all bikes are the same size shape and weight, right? Moto Minarelli, 50cc, 20hp, 133mph.
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28642 Tucson Az Gender:	Re: Ducati....112 mph, 350cc single? Reply #19 - 03/31/15 at 21:19:49 gizzo wrote on 03/31/15 at 21:03:22: Moto Minarelli, 50cc, 20hp, 133mph. Big cliff and a tailwind?... ...
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gizzo Serious Thumper Offline SuzukiCabbage. It's Savage. Posts: 1318 Australia	Re: Ducati....112 mph, 350cc single? Reply #20 - 03/31/15 at 22:07:04 Not really.... Bonneville salt flats 2006 http://www.roadracingworld.com/news/more-on-motorcycle-land-speed-records-set... It's a silly example for sure. But illustrates that one set of numbers doesn't fit all.
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Re: Ducati....112 mph, 350cc single?
Reply #21 - 04/01/15 at 03:59:03

gizzo wrote on 03/31/15 at 22:07:04:

Not really....
Bonneville salt flats 2006
http://www.roadracingworld.com/news/more-on-motorcycle-land-speed-records-set...
It's a silly example for sure. But illustrates that one set of numbers doesn't fit all.

OK...this thread started out talking about a 350cc, 4 stroke, single cylinder, street legal Ducati that could go 112mph with a megaphone exhaust installed.

Now we are talking about a 50cc, 2 stroke, single cylinder race motor in a streamliner on the Bonneville Salt Flats that went 133mph.

At least they both 2 wheels and have Italian made engines! Wink

And if the streamliner was yellow....they might have that in common as well.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Ducati....112 mph, 350cc single? Reply #22 - 04/01/15 at 06:21:28 The great warriors, the Payute, used the word yellow in describing the fast ones among them. The battle started, he left Fast, he is yellow.. So, yellow is fast. Simple, Why doesn't everyone KNOW this kinda stuff.?
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Re: Ducati....112 mph, 350cc single?
Reply #23 - 04/01/15 at 06:23:00

Serowbot wrote on 03/31/15 at 17:58:58:

It seems to take about 40hp to get a bike up to 100mph...
30hp will get you to 90,...
20hp will get to about 75mph...

22hp will do the ton off a cliff...(if you tuck)... Grin

...

Serowbot:

Just for giggles....use that formula you have stored somewhere and calculate the HP requirements for some MPH milestones....like 50, 100, 150, 200....it will be interesting to see how the HP requirements skyrocket as the speed increases. Air gets to be a huge barrier as the speeds increase.

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18096 Camp Springs, Kentucky Gender:	Re: Ducati....112 mph, 350cc single? Reply #24 - 04/01/15 at 06:25:12 justin_o_guy2 wrote on 04/01/15 at 06:21:28: The battle started, he left Fast, he is yellow.. Sounds like the "yellow" guy is running away from the battle!
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OK.... so what's the
speed of dark?

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Re: Ducati....112 mph, 350cc single?
Reply #25 - 04/01/15 at 07:42:22

60hp will get you 125mph...
100hp = 140mph...
120hp,... 150mph...
160hp,... 170mph...
200hp might tickle the double ton...

Then you hit the wall...(it takes multiple HP to add even one MPH)...
250hp to get Moto GP speeds of 220mph...
225mph can take 400hp... Shocked

...

Those are more "real world" numbers...
Rollie Free might do a little better... Undecided

...

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Re: Ducati....112 mph, 350cc single?
Reply #26 - 04/01/15 at 14:27:12

Dave wrote on 04/01/15 at 03:59:03:

gizzo wrote on 03/31/15 at 22:07:04:

Not really....
Bonneville salt flats 2006
http://www.roadracingworld.com/news/more-on-motorcycle-land-speed-records-set...
It's a silly example for sure. But illustrates that one set of numbers doesn't fit all.

OK...this thread started out talking about a 350cc, 4 stroke, single cylinder, street legal Ducati that could go 112mph with a megaphone exhaust installed.

Now we are talking about a 50cc, 2 stroke, single cylinder race motor in a streamliner on the Bonneville Salt Flats that went 133mph.

At least they both 2 wheels and have Italian made engines! Wink

And if the streamliner was yellow....they might have that in common as well.

Ok, fair comment, and I did say it was a silly example. But you're calling bullsh!t on a bike you don't know by comparing it with a japanese sit up and beg torque monster that was never built to rev, was made to last and has to haul around something the size of jay Leno. The numbers do work with my Enfield I have to admit..29hp, struggles to hit 90mph Embarrassed

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Re: Ducati....112 mph, 350cc single?
Reply #27 - 04/01/15 at 17:17:31

Dave wrote on 04/01/15 at 06:23:00:

Serowbot wrote on 03/31/15 at 17:58:58:

It seems to take about 40hp to get a bike up to 100mph...
30hp will get you to 90,...
20hp will get to about 75mph...

22hp will do the ton off a cliff...(if you tuck)... Grin

...

Serowbot:

Just for giggles....use that formula you have stored somewhere and calculate the HP requirements for some MPH milestones....like 50, 100, 150, 200....it will be interesting to see how the HP requirements skyrocket as the speed increases. Air gets to be a huge barrier as the speeds increase.

FYI, if you double the speed, you quadruple the drag! Wink

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Re: Ducati....112 mph, 350cc single?
Reply #28 - 04/01/15 at 17:48:19

[quote author=5B4145474678495A5C5A414C4F4D280 link=1427733331/15#26 date=1427923632]Dave wrote on 04/01/15 at 03:59:03:

Ok, fair comment, and I did say it was a silly example. But you're calling bullsh!t on a bike you don't know by comparing it with a japanese sit up and beg torque monster that was never built to rev, was made to last and has to haul around something the size of jay Leno. The numbers do work with my Enfield I have to admit..29hp, struggles to hit 90mph Embarrassed

I never said the Ducati 350 could not go 112mph. The only thing I said I didn't believe...was the 22HP rating....and they were going that fast with a single cylinder bike. There must be something different about how they measured that number....since 30 HP bikes can barely get to 100 mph today. My 1974 Suzuki TM 125 was supposed to be 21 HP....and it would most likely go about 70mph at most. My purpose in posting this was to understand what they were doing that could allow a 350cc single cylinder street bike to go 112!

After all this discussion I have come to the understanding that the 350cc version had an engine that was close to being a streetable race engine.....and that for some reason the 22 HP rating they list just doesn't make sense.

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Art Webb

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Re: Ducati....112 mph, 350cc single?
Reply #29 - 04/01/15 at 22:00:18

as someone else noted, it's not just HP, all motos are very 'dirty' aerodynamically, and drag is generally the limiting factor at the top end
But like I said, mt Rebel would hit 75 on a good day, on relatively level ground, and 80+ if I laid down on the tank with my feet on the rear pegs, with 16 HP
Admittedly it' was a twin, but 16 hp is 16 hp

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