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General Category >> Rubber Side Down! >> How Do You Measure RPM When Setting Idle Speed?
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Message started by Digger on 07/05/07 at 20:26:05

Title: How Do You Measure RPM When Setting Idle Speed?
Post by Digger on 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!

Title: Re: How Do You Measure RPM When Setting Idle Speed
Post by serowbot on 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.

Title: Re: How Do You Measure RPM When Setting Idle Speed
Post by verslagen1 on 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. ;D

Title: Re: How Do You Measure RPM When Setting Idle Speed
Post by LANCER on 07/06/07 at 05:01:40

I like to see numbers, so I bought a tach.

Title: Re: How Do You Measure RPM When Setting Idle Speed
Post by Reelthing on 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

Title: Re: How Do You Measure RPM When Setting Idle Speed
Post by LANCER on 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.