Idling question - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #1 of 6 Old 03-07-2017, 06:00 PM Thread Starter
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Idling question

I was wondering what the ideal RPM should be under normal conditions at a sitting idle? I'm just a smidge over 1k and it seems OK but figured I'd ask anyway. Have a 2012 KLR with 4k on her.

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post #2 of 6 Old 03-08-2017, 07:54 AM
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Originally Posted by Sender1 View Post
I was wondering what the ideal RPM should be under normal conditions at a sitting idle? I'm just a smidge over 1k and it seems OK but figured I'd ask anyway. Have a 2012 KLR with 4k on her.

Sender1,
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Service manual calls for 1300 +/- 100.
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post #3 of 6 Old 03-08-2017, 08:25 AM Thread Starter
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Copy, thanks felt it was ok but seemed like she needed a bit more to drink

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post #4 of 6 Old 03-08-2017, 02:53 PM
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1000rpm is OK, if it sounds happy and no flame outs when you start to open the throttle.
Wattman, that sells the Thermo-Bob even drops to 900 rpm to save gas.

One of the issues with too low of idle speed can be voltage drop, so I prefer 1200-1300 rpm. One can see the difference with the headlight shining on a wall. And then the fan kicks on, headlight dims some more!

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post #5 of 6 Old 03-09-2017, 12:05 AM
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Originally Posted by pdwestman View Post
1000rpm is OK, if it sounds happy and no flame outs when you start to open the throttle.
Wattman, that sells the Thermo-Bob even drops to 900 rpm to save gas.

One of the issues with too low of idle speed can be voltage drop, so I prefer 1200-1300 rpm. One can see the difference with the headlight shining on a wall. And then the fan kicks on, headlight dims some more!
I agree with pdwestman that 1,200 is a good idle.

I like to run my 2011 gen2 at 1,000 just for the way it sounds. I may have to give it a little throttle while I back it out of the garage on cool mornings to keep it running, but once I roll out of the driveway it is fine.

Earlier today answered a riders question about battery drain at idle if he hot wired his radiator fan. I idled mine at 1,000 rpm with the fan on and the low beam headlight on. It was making 14.35 volts before the fan came on and actually went up a little when the fan came on.

I am not sure if there might be an oil pressure problem at low idle, but I have put many tens of thousands of miles on my two gen2s with no problems. pdwestman would know a lot more about oil pressures.
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post #6 of 6 Old 03-09-2017, 10:11 AM
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Good info, as always, from PD and GoMotor.....good to know there isn't a big battery draw at 1000 rpm's. I idle mine at 1200 over (clearly unfounded) concerns of battery discharge and possible lubrication issues at lower rpms (undoubtably also unfounded!).

Now that I think about it, my bike seldom idles anyhow; if it's cold and I'm warming it up, I have the enricher on and idle is over 1500....I tend to not let it idle long and then get on and ride fairly soon (30 - 60 seconds) in order to get it up to operating temperature more quickly.

I couldn't care less about the fuel I burn whilst idling, myself.

Dave
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