Engine stalled back wheel locked!

[STUNICS]

I was coming along the A5 two up at 70ish on my 07' GSA , came up the slip road at Milton Keynes slowed down to about 25-30 MPH pulled clutch in ready to stop at traffic lights, engine cut out! Let clutch out to "bump" the engine, back wheel locked and started skidding! pulled in clutch pressed engine start button, engine starts, let clutch out everything fine!!!!

Gave me a bit of a fright! Girlfriend too! She is a bit of a scardy cat so had to lie and say It was no big deal!

Bike has 4000 miles on it and has never missed a beat!!

Would somebody like to tell me what the F**K that was about?

Happen to anyone else?

 

[Mountain Ash]

Same thing on GS650

Had a similar thing with the Dakar, thought it was the tyres (big flat spot from previous owner), but sure gave me a fright. 650 seems to cut out extremely randomly, and the clutch in /out to bump doesn't seem to be a bright idea !

Any idea what might cause the cut out in the first place ?

 

[GrinningGSer]

I have no idea why your engine stopped, but a stopped engine in a low gear will lock the rear wheel on a GS

My first GS had the servo brakes and I once switched the ignition off as a deliberate test so as to see what the brakes felt like with no electrics... and was completely unexpecting the resultant locked rear wheel. At first I couldnt figure out why my bike was suddenly skidding all over the place. You never stop learning!

 

[GSmonkey]

Did a similar thing when my fuel pump went. 600cc pots= a lot of compression and back torque.

 

[RickG]

It's no surprise the wheel locked as bumping big twins in low gears is nearly impossible. If you can go through the gears until nearly at a standstill before you pull the clutch it'll help. The cutting out in those circumstances is probably nothing that a tweak of the throttle balance and idle settings wouldn't cure.

 

[Deleted account 211025001]

Engine cutting out has been reported on here before. I don't think it's very common but it might be worth running a search on it.

Andres

 

[Engineer]

Happened to me once about 2 years ago and again about 6 months ago - was approaching roundabout, slowing normally came almost to a stop, engine cut out just as I was starting to accelerate as the roundabout cleared; ended up in middle of road with stalled bike. Just couldn't figure out what could have caused it at the time.

I reckon it is down to some software glitch with the fuel injection/spark that happens at a very particular engine speed, throttle opening, temperature,gear position, lambda sensor reading etc etc.

A very rare occurrence as it has only happened to me twice in 28,000 miles, but I'm sure that there is a glitch in there somewhere. It wouldn't surprise me if the engine management system did have a few bugs in it - after all it won't have been tested to the same standards as say aircraft systems and they go wrong occasionally.

 

[Wreford Miles]

I was coming along the A5 two up at 70ish on my 07' GSA , came up the slip road at Milton Keynes slowed down to about 25-30 MPH pulled clutch in ready to stop at traffic lights, engine cut out! Let clutch out to "bump" the engine, back wheel locked and started skidding! pulled in clutch pressed engine start button, engine starts, let clutch out everything fine!!!!

Gave me a bit of a fright! Girlfriend too! She is a bit of a scardy cat so had to lie and say It was no big deal!

Bike has 4000 miles on it and has never missed a beat!!

Would somebody like to tell me what the F**K that was about?

Happen to anyone else?

The cause of the cutting out may be a 1200 gremlin but the shaken Girlfriend is due to being in the wrong gear to attempt a bump start.

Potential solutions:
Think about it before you do it again and/or Get a fatter girlfriend

 

[(RIP) Tunneruk]

The cause of the cutting out may be a 1200 gremlin but the shaken Girlfriend is due to being in the wrong gear to attempt a bump start.

Potential solutions:
Think about it before you do it again and/or Get a fatter girlfriend

Tell it like it is

 

[Russ-AFC]

Try this as a possible cure. I had something similar and was advised by service dept to try it.

Disconnect battery then reconnect. Turn ignition on, dont start, open throttle fully 2 times. (As per manual instructions for installing the battery.) The engine management system registers the throttle-valve positions by doing this. Turn off ignition. Don helmet and protective gear start normally and go for a ride to test.

Worked for me but not sure of the theory.

 

[cookie]

Try this as a possible cure. I had something similar and was advised by service dept to try it.

Disconnect battery then reconnect. Turn ignition on, dont start, open throttle fully 2 times. (As per manual instructions for installing the battery.) The engine management system registers the throttle-valve positions by doing this. Turn off ignition. Don helmet and protective gear start normally and go for a ride to test.

Worked for me but not sure of the theory.

that's a TPS reset.

it sets the baseline for the Throttle Position Sensor with the ECU.

 

[MikeP]

It's no surprise the wheel locked as bumping big twins in low gears is nearly impossible. If you can go through the gears until nearly at a standstill before you pull the clutch it'll help.

Alternately, use right thumb to press starter button.

Simple really!

 

[STUNICS]

Thanks for everyones contribution and advice. I think from the general feedback that the stalling is probably due to a software glitch we'll have to see!
I bow to others superior knowledge on the bumping of big twins having not done it before, I just can't believe that two up at 25mph in any gear it wouldn't turn the engine over!!! but it looks like that is probably the case!

I can't say I though very hard about letting the clutch out given the time scales, it is just an automatic reaction to any stalled engine, don't think i'll be doing it again though!!
Just goes to show even though it is a great bike and I love it, it can bite back if your not careful!

Cheers!

 

[Steve E]

Get it checked to see if the Cam Shaft Position Sensor is breaking down. These are the same symptoms that have happened to me, and was fixed as a goodwill gesture FOC by NoG

 

[Wreford Miles]

It's no surprise the wheel locked as bumping big twins in low gears is nearly impossible.QUOTE]

Where there's a will there's a way...

After my 1150 swallowed a river and ran the battery flat pumping it dry the only option to re start was a KTM tow assisted bump start in the woods... 2nd gear, muddy track and not much speed but she caught first time following the right bounce and feeding in of the clutch

 

[wadham]

I have reported the same problem to NOG with my 08 1200 GSA and had the same problem on my last 1200RT.

They cannot find the problem on the bike but tested it and found it happened to them once on along test ride but could not identify whats wrong.

I am going to pursue the matter further with them and BMW.

This issue is dangerous as the engine just cuts out when clutch is pulled in and it has happened to me when entering roundabouts and turning into uphill hairpins.

On a recent trip to France & Spain it happened less than in the UK - ?????

 

[GS TRV]

I'd go back to the dealer's sharpish