SuzukiSavage.com - 100 mph possible?

DavidOfMA Senior Member Offline Getting back in gear after a long time away Posts: 336 Beverly, MA Gender:	Re: 100 mph possible? Reply #15 - 12/05/12 at 18:36:28 Got my Yamaha 200 two-stroke up above 100mph several times many years ago, but it was much lighter than the S40 (and I was much lighter, too!).
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28661 Tucson Az Gender:	Re: 100 mph possible? Reply #16 - 12/05/12 at 18:40:57 How much heavier than an S40 are you now?... ...
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DavidOfMA Senior Member Offline Getting back in gear after a long time away Posts: 336 Beverly, MA Gender:	Re: 100 mph possible? Reply #17 - 12/05/12 at 19:13:22 Still lighter...but by a slimmer margin.
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Charon

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Re: 100 mph possible?
Reply #18 - 12/05/12 at 20:36:45

Given level ground, neither your weight nor the weight of the bike are very significant factors. The significant factor is aerodynamic drag. That is assuming you don't run into engine rev limits, such as Honda's Fury electronically limited to 99 mph for tire ratings. I personally do not believe the LS650 in stock form has any chance at all of making 100 mph.

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Eschew obfuscation.

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ralfyguy

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Re: 100 mph possible?
Reply #19 - 12/05/12 at 21:12:34

I had mine up to about 95 countless times and I never felt really unsafe on it. Coming from Germany, speed isn't really all that of a big deal. We grew up driving anything at the limit all the time. It isn't the most well planted feeling bike at that speed, but to me it certainly isn't scary either.
I once had a modified Ford Escort Cosworth RS Turbo, and that thing was by far the most challenging vehicle I ever drove. Front wheel drive, 25% viscosity differential that was doing not really what it was supposed to and you stepped on it and on uneven surfaces you were working on the wheel just to keep it on the road. But it was fun because of that. I like difficult to tame vehicles.

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Serowbot

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OK.... so what's the
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Re: 100 mph possible?
Reply #20 - 12/05/12 at 21:50:59

Charon wrote on 12/05/12 at 20:36:45:

Given level ground, neither your weight nor the weight of the bike are very significant factors. The significant factor is aerodynamic drag. That is assuming you don't run into engine rev limits, such as Honda's Fury electronically limited to 99 mph for tire ratings. I personally do not believe the LS650 in stock form has any chance at all of making 100 mph.

There's no limiter on a Savage,.. but, you're right...
Stock,.. you hit redline at 97mph, and you won't likely do that with the stock HP...
... but,.. on a good day,.. with a slightly modded bike, I have seen a real 95mph (140-90-15 tire)...
... and with a tailwind,.. and a slight downgrade,... it's possible...

And just knowing that it is possible, is perfect...
If you really want to go 100mph,.. just buy a bike that does a hundred...
There's a ton of bikes that will do that with one piston tied behind their back...
I don't want the ton to be easy... I want the dream of maybe being able to achieve it, just barely, under the right conditions...
That's perfect for me...

I've done over a ton and a quarter on a bike that you would expect to do it...
Mehhh...
It's the goal,.. or the dream,.. that gives the thrill...
Not just turning the throttle...

It takes a perfect size bike to tease you with the ton... Grin

...

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Ludicrous Speed !... ... Huh

...

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BuckRYCA Senior Member Offline Posts: 258 New London, CT, USA Gender:	Re: 100 mph possible? Reply #21 - 12/06/12 at 20:06:26 Well said, Serowbot, the Savage is just the right bike to make doing the ton a worthy quest.
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Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:	Re: 100 mph possible? Reply #22 - 12/07/12 at 05:08:50 What would an aerodynamicist compute to the be HP needed for a Savage to do the ton, with an average-sized rider sitting upright? (talk about draggy!!!)
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LANCER

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Re: 100 mph possible?
Reply #23 - 12/07/12 at 05:14:09

Gyrobob wrote on 12/07/12 at 05:08:50:

What would an aerodynamicist compute to the be HP needed for a Savage to do the ton, with an average-sized rider sitting upright? (talk about draggy!!!)

Maybe a couple of hp, aerodynamic drag does not be come a significant factor until you get into the 150+ range. It's almost like a geometric progression, building slowly at first and then jumping way up.
It's been a lot of years but I seem to remember something like that from flight school.

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Gyrobob

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Re: 100 mph possible?
Reply #24 - 12/07/12 at 05:23:12

LANCER wrote on 12/07/12 at 05:14:09:

Gyrobob wrote on 12/07/12 at 05:08:50:

What would an aerodynamicist compute to the be HP needed for a Savage to do the ton, with an average-sized rider sitting upright? (talk about draggy!!!)

Maybe a couple of hp, aerodynamic drag does not be come a significant factor until you get into the 150+ range. It's almost like a geometric progression, building slowly at first and then jumping way up.
It's been a lot of years but I seem to remember something like that from flight school.

a couple of horsepower? is this a typo?

Drag increases with the square of speed,.. so with something as draggy as a Savage with an upright rider (assuming a drag coefficient of approx 1), it takes twice the horsepower to go 85mph compared to 60mph, and four times the horsepower to go 120.

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18099 Camp Springs, Kentucky Gender:	Re: 100 mph possible? Reply #25 - 12/07/12 at 05:47:20 I poked around on the internet a bit, and the only motorcycle power vs. speed example I found was this: It appears that it takes about 40 HP for a streamlined crotch rocket to go 100mph. Not sure how that relates to a cruiser style motorcycle which is less streamlined.
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10667 Oklahoma Gender:	Re: 100 mph possible? Reply #26 - 12/07/12 at 05:52:56 No, not a typo, but an educated guess based on faint memories from flight school years ago. The formula you mention seems familiar to my aged memory, it's just that at low speeds "aerodynamic drag" is of little effect. It's at the higher speeds when it is farther up the curve that the effect becomes a significant factor.
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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10667 Oklahoma Gender:	Re: 100 mph possible? Reply #27 - 12/07/12 at 05:59:00 Yep, that kind of curve looks very similar to an aerodynamic drag chart. Keep in mind that this hp vs speed curve chart for the bike is affected by mechanical friction from the engine/trans/drive train and road friction as well as aerodynamic forces. For a bike/rider on the road, aerodynamic drag is only part of the equation.
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Gyrobob

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Re: 100 mph possible?
Reply #28 - 12/07/12 at 06:01:33

LANCER wrote on 12/07/12 at 05:52:56:

No, not a typo, but an educated guess based on faint memories from flight school years ago.
The formula you mention seems familiar to my aged memory, it's just that at low speeds "aerodynamic drag" is of little effect. It's at the higher speeds when it is farther up the curve that the effect becomes a significant factor.

For a body with a drag coefficient of about 1.0, low speeds means 20-25 mph. By the time you hit 60, drag is quite a factor.

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Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:	Re: 100 mph possible? Reply #29 - 12/07/12 at 06:22:44 Here's about what it looks like for a Savage.
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