SuzukiSavage.com - 5000 rpm safe?

batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: 5000 rpm safe? Reply #60 - 01/06/17 at 12:57:50 showing is better than telling ,let me see a dyno printout where it doesn't!
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Kris01

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Re: 5000 rpm safe?
Reply #61 - 01/06/17 at 13:15:36

Dave wrote on 01/06/17 at 03:22:24:

The stock Savage engine is listed as having 31 HP @5,400 rpm, and 37 ft/llbs @3,400 rpm.

So at 5252 RPM we are making close to 31 ft/lbs of torque (actually a little less) since we make 31 hp at 5400 RPM.

http://motorcycleperformanceanalyzer.com/suzuki/ls-650-p-savage-2000/

Click the left hand Power tab for a dyno graph. Take these numbers with a grain of salt.

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piedmontbuckeye

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Re: 5000 rpm safe?
Reply #62 - 01/06/17 at 13:38:36

Kris01 wrote on 12/16/16 at 18:04:36:

Suzi built this bike for people who rev less than 4000 and ride at 45 mph. Just an observation.

Ditto, that's me, except I like cruising around on two-lane back roads at around 50 MPH. I stay in 3rd gear and the engine sounds like it is just purring perfectly at that speed.

I am curious, all of this discussion of RPM's vs speed at that RPM - isn't that all presuming the same gear ratio from front to back wheel sprocket?

Were all models and all years the same from the factory?

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: 5000 rpm safe? Reply #63 - 01/06/17 at 13:46:48 The rear wheel/tire size, and front and rear sprocket sizes have always been the same. The early bikes up to 1992 were 4 speed, 1993 and later are 5 speeds.
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #64 - 01/06/17 at 14:46:25 4-speed: Primary 1.888 (68/36) Secondary 2.9565 (68/23) 1st 2.214 (31/14) 2nd 1.500 (27/18) 3rd 1.095 (23/21) 4th 0.875 (21/24) 5-speed: Primary 1.8108 (67/37) Secondary 2.9565 (68/23) 1st 2.3333 (35/15) 2nd 1.5789 (30/19) 3rd 1.1429 (24/21) 4th 0.9565 (22/23) 5th 0.8846 (23/26)
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piedmontbuckeye

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Re: 5000 rpm safe?
Reply #65 - 01/06/17 at 15:14:10

I am a tach person, but because of the lack of one, and also because I am cheep, I will just have to get used to the "sound" of the engine to determine best speed/gear to go.

I have had a lurking thought that I wonder what the engine sounds like when it is nearing red-line, and then be sure to stay away from that!

I (based on my previous experiences) rarely ever get the throttle over half way, unless it would be in the lower gears just before shifting. It is hard to determine that, at the mechanical throttle position is not exactly the same as the position of the carb slide since it is controlled by the vacuum (which can be affected by a number of factors) which make it a little independent of the mechanical position of the throttle plate in the venturi of the carb.

My main concern is to not to over load the engine, nor over-rev it. I just like being comfortable. I never hot-rod, race, accelerate fast (unless chased by a bear or something!) and I never speed-shift, or down shift abruptly. I am just an old boring guy!!!

Most whipper-snappers don't like to ride with me, nor I with them!

Tender loving Care - THAT's what my bike gets!!

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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #66 - 01/06/17 at 16:01:14 If you ever over-rev the engine, you'll know it! It sounds like it's going to explode way before you get to max RPMs!
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Ruttly Serious Thumper Offline Thumpers Rule Posts: 5112 Manteca , CA Gender:	Re: 5000 rpm safe? Reply #67 - 01/06/17 at 20:53:03 Dave , Wasn't the 4 speed only produced for the first two years of production 1986-87 ?
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28887 L.A. California Gender:	Re: 5000 rpm safe? Reply #68 - 01/06/17 at 21:06:43 Ruttly wrote on 01/06/17 at 20:53:03: Dave , Wasn't the 4 speed only produced for the first two years of production 1986-87 ? Likely produced until '94 but wasn't imported to the US after '88 then resumed with the 5 speed in '95
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #69 - 01/06/17 at 21:09:01 4 speeds lasted from 1986-92.
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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: 5000 rpm safe? Reply #70 - 01/06/17 at 21:13:36 Kris , I looked at your graph, 5250rpm hp was about 30 ,torque at 5200rpm(graph jumps from 5200to5300)was 40 nm, or 29ftlbs .So I'd say hp=torque at 5252.hp is still climbing they claim 33 hp @5400 that turns out to be around 86-88 mph which is about what a stock bike's top speed is rated for if I remember .
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #71 - 01/06/17 at 21:16:41 You can click on the right and change nm to ft/lbs.
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LANCER

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Re: 5000 rpm safe?
Reply #72 - 01/07/17 at 07:00:54

Dave wrote on 01/06/17 at 03:22:24:

LANCER wrote on 01/06/17 at 01:01:53:

So are HP & Torque values equal on the LS650 ?

I don't think the LS650 knows anything about math.

Your engine may not know anything about math - but the HP number is created by math.....Horsepower ratings are a function of math (torque x rpm.....with the 5,250 number added to make the numbers somewhat meaningful

Thank you Dave, I do understand the basic math for hp & torque but in my statement I just did not make my thoughts and question complete or clear, so my apology for that. I was just thinking over the idea of so many different types and sizes of engines, some of which may never have been designed to exceed 5250 rpm, and in such cases how could it be impossible for hp & torque to cross at that point ?

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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #73 - 01/07/17 at 07:24:56 I saw a video years ago of a huuuuge engine that was designed to run at an impossibly low RPM (like 300 or something). The same formula still applies. I guess in this case 0 ft/lbs at 5252 rpm = 0 hp!
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Kris01 Serious Thumper Offline Eat, sleep, RIDE! Posts: 3767 Tennessee Gender:	Re: 5000 rpm safe? Reply #74 - 01/07/17 at 07:34:02 Here's an example: https://www.youtube.com/watch?v=awJIvdzL5dE
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