SuzukiSavage.com - Max RPM?

boyett YaBB Newbies 2004 No Login Offline Posts: 7 Santa Rosa, CA Gender:	Max RPM? 09/19/05 at 21:51:02 I just put a cheap tach on the Savage that was designed for a Harley. It works fine. Does anyone know what the maximum RPM is supposed to be? The top end of the engine gets pretty noisy at higher RPM and the reason I put the tach on was so that I don't exceed what is safe. Is the max RPM published anywhere? Thanks, JIm
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Mambo

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Re: Max RPM?
Reply #1 - 09/19/05 at 23:37:45

I duno if such datas are available somwhere but if you know the torque is 5,1 mkg @ 3000 rpm and power 31 ch @ 5400 rpm you know you should "travel" @ 3000rpm* and change your gear @ 5400 (the power decrease after 5400, so no real need to go higher and I really doubt this bike could reach more rpm in top gear)

*every explosive engine on this earth are beter to cruise at the torque's peak (less consumption and accelerate quickly)

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Cindi Knox Junior Member 2005 No Login Offline Iron Butt Association Member since 1997 Posts: 58 Four Miles From Minooka Gender:	Re: Max RPM? Reply #2 - 09/20/05 at 01:44:56 I believe it's 6500 RPM, but I'lll look it up.
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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Max RPM? Reply #3 - 09/20/05 at 02:37:10 Red line on my KLX is 7500rpm, the same piston speed on a Savage gives 6500rpm. Clive W
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LANCER

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Re: Max RPM?
Reply #4 - 09/20/05 at 05:35:33

I would have to agree that 6500 is probably the factory number. With the performance cam I have in mine, the power curve is still strong up to 7000...which I use as MAX RPM shift point on hard runs. I have seen close to 8000 on a few rare occasions, though I do not recommend cranking it up that high since the piston speed at that rpm is beyond traditional safe limits.
The racing BSA Goldstars of years gone by did reach 8000 rpm with max power achieved at 7000...but those were blueprinted engines, and the key being that the stroke was only 88mm...6mm less than the Savage...so the piston speed would be less at a given rpm. There were a couple of SPECIAL Goldstars with "super trick engines" that were able to reach 9,000 RPM, which for a big single in the 1950's was nothing short of MIRACULOUS.

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Ed L. Serious Thumper Alliance Member Offline "We All go a Little Crazy Sometimes" Norman Bates Posts: 2808 Sunny Florida Gender:	Re: Max RPM? Reply #5 - 09/20/05 at 06:09:41 6500 rpm is pretty much the accepted max for the engine. Without rejetting and an opened exhaust the power fades away around 5400 rpm. It's a torquey big single made to pull .
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Mambo Ex Member	Re: Max RPM? Reply #6 - 09/20/05 at 06:40:54 Ed L. wrote on 12/31/69 at 16:00:09: ...Without rejetting... btw can somebody explain me what is "rejetting a carb"?
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Savage_Rob Serious Thumper Alliance Member Offline Mechanically Inclined Amateur Posts: 6972 Texas (Dallas area) Gender:	Re: Max RPM? Reply #7 - 09/20/05 at 07:09:25 Mambo wrote on 12/31/69 at 16:00:09: btw can somebody explain me what is "rejetting a carb"? Replacing the main and/or pilot jets to alter the fuel flow.
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vroom1776 Serious Thumper Offline Posts: 2110 Gender:	Re: Max RPM? Reply #8 - 09/20/05 at 08:03:36 LANCER wrote on 12/31/69 at 16:00:09: I The racing BSA Goldstars of years gone by did reach 8000 rpm with max power achieved at 7000...but those were blueprinted engines, What the heck is a blueprinted engine?
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savage777

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Re: Max RPM?
Reply #9 - 09/20/05 at 10:02:49

when an engine is "balanced and blueprinted" in laymen terms the crank is balanced equally on all lobes so that when it turns its weight is evenly distributed along the lenght of the shaft..same goes for cam etc. basically every tolerance is much tighter less play between moving parts ...ports are cleaner, cylinders are ground to allow better oil dispersion it just means the engine is refined to a higher standard than original equipment to get optimum performance

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klx650sm2002 Serious Thumper Offline The more I learn the less I know. Posts: 2041 Cumbria,England Gender:	Re: Max RPM? Reply #10 - 09/20/05 at 10:09:23 I remember Honda's RC 30 the big end clearance was .001" to .004"standard but for race use nothing other than .0025" was used otherwise it would blow. Clive W
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Paladin.

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Re: Max RPM?
Reply #11 - 09/20/05 at 10:27:56

vroom1776 wrote on 12/31/69 at 16:00:09:

What the heck is a blueprinted engine?

Nopody's berfect.

The blueprints contain all the dimensions of the parts. Since noone is perfect, the dimensions are all given with a tolerance. The piston may be listed as 94mm plus/minus 0.1mm. This little bit of slop allows cheaper manufacturing, but you lose a tiny amount of performance.

A blueprinted engine is built zero tolerance, or as close as humanly possible. Each and every part is carefully measured and selected or machined to be right at the specification.

Crazy people blueprint engines. The time and money involved is insane for the small performance increase. Being sane is not as much fun.

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vroom1776 Serious Thumper Offline Posts: 2110 Gender:	Re: Max RPM? Reply #12 - 09/20/05 at 10:37:59 makes sense to me!
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Ed L.

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Re: Max RPM?
Reply #13 - 09/20/05 at 12:32:34

Ballancing the engine is the other way to free up some horsepower, when the engine is ballanced less power is used to shake the engine so more is there for the rear wheel. I don't know if anybody has had a Savage engine ballanced, it has an internal ballancer which keeps the vibration down. Maybe a lighter weight piston would help increase the max RPMs.

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LANCER Serious Thumper Alliance Member Offline Savage Beast Performance Parts Posts: 10606 Oklahoma Gender:	Re: Max RPM? Reply #14 - 09/20/05 at 18:39:05 It would not really INCREASE RPM, since piston speed is the limiting factor...not rpm. However, with a lighter piston it would be able to reach max rpm more quickly.
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