Fast Idle at Full Temp / During no engine braking - Kawasaki Versys Forum
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post #1 of 4 (permalink) Old 08-17-2019, 01:31 PM Thread Starter
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Fast Idle at Full Temp / During no engine braking

I recall someone else posting this some time ago, this happened before I had my ECU flashed, what has changed is I now ride at a much lower RPM in 5th and 6th gear. This is what I have noticed, first my idle is set at `1500 RPM , since my fan comes on at about 195'F now since the flash, 1500 RPM maintains close to 13.9 VDC. So I have experimented and the question is, do other MK-3 650 Versys respond the same way.
This is what happens, if I am at or above 2500 -3000 + RPM ( in 2nd or higher gear)and decide just to brake ( with the clutch pulled in) or even just pull in the clutch , my idle goes to 2000 RPM, letting the clutch out with no additional throttle it will try and maintain 2000 RPM. OK same 2500-3000 +RPM, this time I back off the throttle and even downshift one gear, engine brake even 2 seconds, pull the clutch in and just brake or even coast with the clutch in and idle is now/ goes to 1500 RPM.I assume this is something in the map of the ECU or is it?

Last edited by onewizard; 08-17-2019 at 01:33 PM.
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post #2 of 4 (permalink) Old 08-18-2019, 04:45 PM
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SOMETIMES my '15 will rev to about 2,000, but I just pull in the clutch, rev the throttle slightly, then it backs down to 1,500.
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post #3 of 4 (permalink) Old 08-18-2019, 10:32 PM
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There will certain amount of engine braking no matter what speed/rpm you are in as long as the bike is in motion. So you may get fast idle at 2000rpm due to slight engine breaking which is normal. IMHO
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post #4 of 4 (permalink) Old 08-19-2019, 11:52 AM Thread Starter
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Originally Posted by Fastoman View Post
There will certain amount of engine braking no matter what speed/rpm you are in as long as the bike is in motion. So you may get fast idle at 2000rpm due to slight engine breaking which is normal. IMHO
Once I notice something off I look real deep into it. I purposely pulled in the clutch on a off ramp at 80 KM/HR at the same instant I had released my throttle , strictly used my front and some rear brake, came to a stop light that just turned green all the time on the off ramp I was at 2000 RPM, since I make a point of knowing what gear I am in, I upshifted to 4th as I was in a 60 KM/HR zone, without touching the throttle the RPM was at 2000 and pulling in 4th. I then dropped a gear and engine braked for less than 2 seconds,pulled in the clutch for 3 seconds and was at 1500 RPM. Next test was in 6th gear doing 85 KM/HR , pulled in the clutch and released the throttle at the same time, I coasted down to 65 KM/HR all at 2000 RPM with the clutch in,I blipped the throttle with the clutch still pulled in, still at 2000 RPM, to the point that I was on a major highway and doing 50 KM/HR in a 80 was asking for trouble, less than 2 seconds of engine braking reduced and remained at 1500 RPM.
The main reason for this testing was the fact that some have had a pinched throttle cable or a dry throttle cable, my conclusion is the ECU needs to see some speed reduction combined with a reduction in the TPS , otherwise it maintains a certain minimum fueling in the throttle bodies. Since others have posted similar results, ( I can't find the thread ) , my concern was also if something was sticking in my throttle bodies. Since my very last test was a gentle one, and less than 2 seconds of very light engine braking with a return to 1500 RPM, my conclusion is something to do with the ECU.
I should point out like I said earlier, this happened before my ECU was flashed, just that I never rode below 4000 RPM in 4th or higher, I now am able to ride in 6th at 50 KM /HR ( I don't make a habit of it but at 60 KM/HR I am in 6th when going through small villages , no more need to downshift , and very easy to return to 80 or 90 KM/HR without having to leave my highway pegs , thanks @Steve in Sunny Fl )
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