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How Do You Measure RPM When Setting Idle Speed? (Read 17 times)
Digger
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How Do You Measure RPM When Setting Idle Speed?
07/05/07 at 20:26:05
 
For years, I've been setting the idle speed on my dirt bikes and my Savage by ear (no tach).

For those of you without tachs mounted on the bike, how do you set your idle speed?

TIA!
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Digger
2001, Metallic Glacial Blue, Raptor Petcock, Verslavy (first hole) (otherwise, mechanically, the bike is stock), 13,xxx miles
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Serowbot
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OK.... so what's the
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Re: How Do You Measure RPM When Setting Idle Speed
Reply #1 - 07/05/07 at 22:35:00
 
I try to count really fast...
No really, I just put it a little higher than I like, to make sure I'm on the safe side with oil flow.
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Ludicrous Speed !... ... Huh...
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verslagen1
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Re: How Do You Measure RPM When Setting Idle Speed
Reply #2 - 07/05/07 at 22:38:45
 
1200 rpm / 60 sec per min = 20 rps

4 stroke = 1 pop per 2 rev

20 rps / 2 = 10 pops per second

But I always thought it loped along with my heartbeat or vise versa.   Grin
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LANCER
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Re: How Do You Measure RPM When Setting Idle Speed
Reply #3 - 07/06/07 at 05:01:40
 
I like to see numbers, so I bought a tach.
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Reelthing
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Re: How Do You Measure RPM When Setting Idle Speed
Reply #4 - 07/06/07 at 06:19:02
 
Tach on the '95 but not the '02 - was fooling around the other day and seems to me a proper idle is set when the head light no longer dims any when you let it idle - looks to be 1100-1200rpm
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LANCER
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Re: How Do You Measure RPM When Setting Idle Speed
Reply #5 - 07/06/07 at 09:03:02
 
When not using a tach, I listen for a comfortable easy idle.  If it gets too low it will sound a bit labored.
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