I have a problem I'm trying to solve .
I went to start bike after a stint of not using it and turn key on no start.
SYMTHOMS
-EWS on dash,
-No neutral
-No gear neutral indicated on dash.
-No fuel pump sound
-Low beam' is on which is not normal .
I have put battery on charge since and back on bike (no luck).
I did alot of reading online so decided to replace ring antenna (no luck)
Thought have i brought a dud ring antenna so plugged it into my r1200gs started up. So tested old antenna on r1200gs started up.
Took battery out of r1200gs put in f800gs (no Luck).
Went to dealer he said change battery it has a reading of 12.60 volts (f800gs) which he said is low should be 12.80 volts the (r1200gs) has 12.50 volt and starts it fine.
I tested all my other vehicles batterys and ranged from 12.40volts to 12.75 volts all start fine.
Is 12.60 volts stuffed??? I looked at date on battery 10 yrs old its the original battery Is this the problem?.
So I put (f800gs) battery in r1200gs started bike better and stronger than is own battery.
I put battery on charge again and took to auto electrician to load test battery he tested it standing voltage 12.90 volts and passed load test without a hint of trouble he said this battery is 10yrs old but healthy not my problem.
I have read online wires chaffing and breaking in lome ( I have not gone this far yet).
Also read the computer not booting up properly after battery been removed and you are to turn key off and on two times to sort this (no luck).
I have also read people having had to replace the engine control unit under the seat BMS-K $1500- $2000 ouch ?
I have also talked to a BMW expert not dealer ( dealership trained) he is currently working on another f800gs with similar problem (but no low beam on ) and he is going through the loom looking for a break and will take a look at mine if I have no luck once he can work out his current one
Also note as part of my routine I store my bikes un ridden for months on end so will disconnect battery from bike and trickle charge to maintain battery health every 3 months bikes are only disconnected for the night when doing this.
I really would appreciate if you have experienced the above symptoms especially the low beam on I would like to here from you .
cheers ken
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