Idle rpm

[dimatrixxx]

My c400gt was at 10k km inspection and I asked the dealer to update the software. Beside some changes in the TFT I mentioned that my motor is running now at about 1600-1700 rpm at idle even when it has operating temperature. Before the update it was always 1400-1500. Does anyone run a newly firmware 023_… ? What is your idle rpm?

 

[wspollack]

My '23 C 400 GT -- delivered to me in mid October 2023, hot off the presses, from somewhere (a warehouse? direct from overseas?) -- idles at a flip-flop 1400/1500 when up to operating temp, same as the '22 that I bought in June 2022.

I had the initial service performed at that same local BMW dealership in December 2023, but there was no mention in the receipt of any firmware update. Do you know if there's a way to display the firmware level on the TFT (I don't have any of those code-reading devices)?

 

[dimatrixxx]

Yes, just go in to the settings/information/software. My scooter is running now the version 023_011_090

 

[wspollack]

Yes, just go in to the settings/information/software. My scooter is running now the version 023_011_090

Okay, thanks.

It turns out that, yes, your software is a bit newer than mine:

 

[mzflorida]

My c400gt was at 10k km inspection and I asked the dealer to update the software. Beside some changes in the TFT I mentioned that my motor is running now at about 1600-1700 rpm at idle even when it has operating temperature. Before the update it was always 1400-1500. Does anyone run a newly firmware 023_… ? What is your idle rpm?

Hmm. Thought I was nuts. Mine is running high too after the update, similar to you but 16 -1800 RPM.

 

[wspollack]

Hmm. Thought I was nuts. Mine is running high too after the update, similar to you but 16 -1800 RPM.

Are you on 023_011_090, like @dimatrixxx, or on 023_011_060, like me, or some version not mentioned yet?

 

[Hornblower]

I usually don't take a bike back to the dealer unless there's a problem I can't fix. As a result, I can miss out on software updates. I just checked and my '23 C400GT is running on S/W Version 022_008_020. I'm hesitant to mess with it since it's running and idling just fine.

 

[mzflorida]

Are you on 023_011_090, like @dimatrixxx, or on 023_011_060, like me, or some version not mentioned yet?

I’m running 060

 

[mzflorida]

I usually don't take a bike back to the dealer unless there's a problem I can't fix. As a result, I can miss out on software updates. I just checked and my '23 C400GT is running on S/W Version 022_008_020. I'm hesitant to mess with it since it's running and idling just fine.

Yup. I get it completely.

 

[wspollack]

Hmm. Thought I was nuts. Mine is running high too after the update, similar to you but 16 -1800 RPM.

So you got updated to 060 ... when, what was the occasion, what prompted the update, etc.? And when the scoot was brand new, it had been running 14/15 when warm, but now it's 16/18, do I have all that correct?

Edit: BTW, I run E0 high-test almost all the time on the bike. I wonder if it's a winter-blend thing (here in the USA, anyway).

 

[mzflorida]

So you got updated to 060 ... when, what was the occasion, what prompted the update, etc.? And when the scoot was brand new, it had been running 14/15 when warm, but now it's 16/18, do I have all that correct?

Edit: BTW, I run E0 high-test almost all the time on the bike. I wonder if it's a winter-blend thing (here in the USA, anyway).

It was loaded at the 600 mile service as a required, and very lengthly, update. Yes, to the best of my recollection it was right at 1400 RPM. I think we are RVP9 year round here, just different summer blends year round. Miami and the Keys are different. I’m going off memory and could be typing out of my hindside.

 

[wspollack]

It was loaded at the 600 mile service as a required, and very lengthly, update. Yes, to the best of my recollection it was right at 1400 RPM. I think we are RVP9 year round here, just different summer blends year round. Miami and the Keys are different. I’m going off memory and could be typing out of my hindside.

This is all very weird, looking like one of life's little mysteries so far.

1) Maybe 090 is not yet available in the USA. I mean, you and I have 060 -- mine as delivered in Oct., and yours as updated (sometime before that?) -- and @dimatrixxx (from Spain) has 090. And recall that my first service was just in December, and nothing about an update on the receipt.

2) Since I was, and still am, in the break-in period, for the couple of rides I got in -- delivered on Oct. 19, last ride of the season on Nov. 7 -- I had the display set to Urban, so I could be mindful of the RPMs.

(It still bothers me, and I commented in one survey a month or so ago, that you can see the RPMs only on the Urban screen. Why they can't put that info also on the My Vehicle screen, and remove the silly picture of the bike, is beyond me.)

The break-in service, to refresh anyone's memory, is specified in the owner's manual as between 300 - 750 miles, while the engine is supposed to be kept under 7,000 RPM until 621 miles. I have 438 miles, so, yep, I was paying attention to the tach the whole time so far. And that's why I noted to myself that, yep, when warmed up the '23 is doing the same 14/15 flip-flop at idle that my '22 did for its entire 5,644-mile life.

 

[mgg]

Can't tell you what my scooter is idling at but I assume it is 14 -1500. Is anyone having a problem with the slower idle? I only have a few hundred miles on my bike. I purchased it November 14th and the sales person said he just got 3 of them including the one I got. He said it would be their last shipment of 23's. Don't know when it was made. I notice that on my bike it does not auto start like my Indians did. (With the Indian Motorcycle all you have to do is touch the button and it will crank until it starts or a certain number of cycles. With the BMW I have to hold the button til it starts. But once it starts it does not kill on me or feel like it is going to kill on me. I usually let if warm up for at least 30 seconds to a minute and it has not died on my yet. Seams to run and idle smoothly.

I guess what I'm trying to say/ask is why do you think they would increase the idle if it was running fine? If it runs well at the lower RPM I think it would preserve a little gas and I would prefer it.

 

[mzflorida]

Can't tell you what my scooter is idling at but I assume it is 14 -1500. Is anyone having a problem with the slower idle? I only have a few hundred miles on my bike. I purchased it November 14th and the sales person said he just got 3 of them including the one I got. He said it would be their last shipment of 23's. Don't know when it was made. I notice that on my bike it does not auto start like my Indians did. (With the Indian Motorcycle all you have to do is touch the button and it will crank until it starts or a certain number of cycles. With the BMW I have to hold the button til it starts. But once it starts it does not kill on me or feel like it is going to kill on me. I usually let if warm up for at least 30 seconds to a minute and it has not died on my yet. Seams to run and idle smoothly.

I guess what I'm trying to say/ask is why do you think they would increase the idle if it was running fine? If it runs well at the lower RPM I think it would preserve a little gas and I would prefer it.

There is a little more to be concerned with with elevated RPMs and no modification to the clutch. The clutch engages at RPMs higher than ~1500. The higher idle speed could produce premature clutch wear, and possibly influence other premature system failures.

I think this is a glitch in the software but totally guessing. My RPMs yesterday were 1900 2000 stopped. I have another issue that needs to be addressed and will take it in when that part gets in.

 

[mgg]

There is a little more to be concerned with with elevated RPMs and no modification to the clutch. The clutch engages at RPMs higher than ~1500. The higher idle speed could produce premature clutch wear, and possibly influence other premature system failures.

I think this is a glitch in the software but totally guessing. My RPMs yesterday were 1900 2000 stopped. I have another issue that needs to be addressed and will take it in when that part gets in.

That seams like a very high idle to me. Does your bike pull at idle? Just wondering because mine does not pull until I give it some throttle.

 

[mzflorida]

That seams like a very high idle to me. Does your bike pull at idle? Just wondering because mine does not pull until I give it some throttle.

I called the dealer today and they are a little concerned too. Pull no...Cutch engaged, very likely, which is of course concerning. Actually, I have a little vibration that I thought felt like a clutch spring. Perhaps related? I'm guessing at this point...and hearing of the other idle speed issues, and thinking critically, it probably is something with the new-ish software.

 

[mgg]

Thanks for sharing this information. I will likely have to get my scooter serviced in FL or as soon as I get back. I have a about 300 miles on the bike now and will likely put another 700 on during vacation. (I would at least like to get the oil changed in Daytona.) Whatever I will tell them not to upgrade the software at this time!

 

[dimatrixxx]

I called the dealer today and they are a little concerned too. Pull no...Cutch engaged, very likely, which is of course concerning. Actually, I have a little vibration that I thought felt like a clutch spring. Perhaps related? I'm guessing at this point...and hearing of the other idle speed issues, and thinking critically, it probably is something with the new-ish software.

Now when you have high idle, is your oil level sensor working? Mine worked fine before the update, but after the update mine no longer works....
My mechanic at the official dealer gave me the phone number of a man who is a pro in bmw motorcycles. He said that the high revolutions are due to the upgrade and now they will be like this... and on the oil sensor he said that it is necessary to look in the workshop (although I am sure that the matter is in the upgrade, because the sensor was working properly and nothing except oil change and upgrade of the scooter did not happen that it suddenly broke down

 

[dimatrixxx]

Are you on 023_011_090, like @dimatrixxx, or on 023_011_060, like me, or some version not mentioned yet?

Not quite right. RPM change is caused by the software version of the engine control unit. We cannot see what version I have or you have (Ista P software is needed). So it is not correct to compare TFT software versions. You have version _060 and mzflorida has version _060, and the idle revs are different because you have different engine control unit software version than he

 

[mzflorida]

Not quite right. RPM change is caused by the software version of the engine control unit. We cannot see what version I have or you have (Ista P software is needed). So it is not correct to compare TFT software versions. You have version _060 and mzflorida has version _060, and the idle revs are different because you have different engine control unit software version than he

That is very helpful to know and why I enjoy and appreciate these forums. Thanks!