BMW R1200R R1150R/T F800 K1200R R1100R/T R1250R RnineT Message Board

Hello everyone, I am looking for some advise:
My 2007 R1200R starts fine at the first push of the starter button. I engage first gear and roll off perfectly, however when I let go of the throttle to slow down (not the quick let go to switch gears) there is an explosion and the bike dies on me. After I start the bike again (clutch in, press start while moving in traffic) it will not happen again until I stop the bike for over 10 minutes. I have taken the bike over to the dealership in NYC but any attempt on their part has not solved the problem. I could deal with the annoyance but the other day I was ridding on the FDR Drive and while moving with the traffic at 65 Mph, cars slowed down in front of me, had to let go of the throttle and it died immediately. It took me few start pushes to get it on again and the car behind me almost tapped me.

I will appreciate any input.
Thank you all and have a great day!

Silvio.
2007 R1200R

This sounds more like a safety risk than just an annoyance. Could the dealer guy reproduce the problem? An 'explosion' sounds like the ignition timing is severely out, not just a lean condition. What comes to mind are the spark plug gaps (changed plugs last when?), or an ignition coil, or maybe a severe air leak. However, each of those would make it seem that the bike shouldn't run well to start with, and yours seems to run fine until you roll off the gas.

Hi Harald, thank you for you response. The last time I took the bike to the mechanic, he found that the left side hose had a small crack on it and replaced it. That of course did not fix it.
The strange thing is that after it happens once, it won't happen again as long as I do not turn the engine off for a while.
I am going to the dealership tomorrow again. You are correct, it is more a safety issue than an annoyance.
Have a great day!

Silvio.

Couldn't hurt to follow Don E's instructions for lubing the idle speed steppers.
viewtopic.php?f=20&t=27819

Hi Don C,
the idling of the bike is proper and it does not stall while it idles. The problem is when it revs down while I let go of the throttle in motion with a gear engaged and that is the only situation.
I have a workaround of sorts: if I turn it on and quickly twist the throttle, if it tends to choke and not to rev up smoothly, I know I have to turn it off and on again and the next time it will be perfect and it won't happen.

Thank you!

When you " let go of the throttle " at speed on the highway, do you pull in the clutch? If yes, why?

The motor can not die if you leave the clutch alone...it will be driven by the rear wheel. If you slow a good bit then clutch only to down shift to a proper lower gear for your new road speed.

No, I do not clutch in unless the engine turns off. That is my problem right now.

SILVIDEO wrote:No, I do not clutch in unless the engine turns off. That is my problem right now.

Then I do not understand how the engine dies while you are "moving in traffic"...the wheel should be driving the engine and it should start on its own. Or is it dead for a while, even with the wheel driving it as you slow down?

Lifer, the bike is riding fine, then I untwist the throttle to slow down, there is some decompression and the engine goes off. If I do not clutch in the bike would stop because it has a gear engaged. I many times have started a bike with no battery by rolling down hill in second or third gear (clutched in) and eventually as I let go of the clutch the bike would start the same way a stick shift car would start. That is not the case here.
Are you implying this might be an electrical issue?

Thank you for the response.
Silvio.

My internet diagnosis is the TPS is losing connection for a moment.
OR something else is losing a connection when the throttle is released.

Hard to tell from the description.

Riding along, release throttle, bike dies. Turn throttle, bike is still dead.
Correct?

David

Hi David,

that is correct:

I start the bike
begin riding
in any gear release throttle, bike dies
turn throttle, bike still dead
clutch in and then release clutch, bike still dead
only way to get it going again is by pressing the start button.

Once that happens, it won't happen again until I stop the bike for 15 minutes or more.

Thank you for your time.
Silvio.

David R wrote:My internet diagnosis is the TPS is losing connection for a moment.
OR something else is losing a connection when the throttle is released.
Hard to tell from the description.

David

This is all I have. Hard to tell from here.

I still think something is losing power or ground for a second.

David

Thanks David, I appreciate it.
I understand this is very difficult to diagnose.
This is my third 1200R and it has never happened before.

Has your dealer read out error codes? If it's electric I'd assume there is a code stored.

An upgrade of the firmware was made a week ago but it did not solve it.

Thanks Harald.

Based on David's comment about the TPS, I did some research and got to a post on how to reset it. It is mentioned on that post that not even the manual has that information.

The procedure is:
turn on the ignition key but DO NOT start the bike.
twist the throttle all the way in, hold for 2-3 seconds and let go of it.
repeat two more times (three times all together).
turn off the ignition key.

I tried that this morning and the bike did not stall on my short commute from home to work.
Of course, it is too early to know if it realy works and I will report back my findings in a couple of days.

If anyone is interested, I will look for the link and post it (I am at work and the link is on my home computer)

Thank you all for your time and good advice.
Have a great day!

Silvio.

Sounds like you are loosing spark or fuel for that time....if you are getting a backfire??? Sounds like spark is quitting on you.

I would check the side stand position sensor (contacts).By your description,you might have problem right there.I would shorten out that sensor,to see what is happening after.If everithing goes back to "normal" you are right on.Well, got to do some search to find the problem.Do not give it up,this is a wonderful bike.Vell,sh.. happens.Just need pacients to eliminate the problem,and you will love your bike again.R12R is a great bike.

Steve H.

i have never dealt with the dealer in NYC but Max in Brookfield CT is very good, you might want to let them take a look at the bike if you can't solve the problem yourself.

Thanks Steve. How do you shorten the sensor?

Hi,Silvio!
I am back from backhome trip(Serbia).When the sidestand out,puting in 1st gear-engine dies(safety).I would disconnect the electrical plug,get a pice of insulated wire 1-1.5"strip off 1/8" of insulation both end making it "U"shaped,plug it in the disconnected plug making constant current flow +to- terminal.Start the engine,take a test drive,if it works ok you solved the problem.May put a little lubricant onto sidestand switch i.e.WD-40 or similar it may help.If everything is old fashion(engine dies) you may have to look elswhere.This way you might exclude a commonly overlooked source of eventual possible problem.

brgrds,Steve H.
just my 2 cents