2006 BMW F650GS Dakar stalling every 15 seconds

[easyg]

My poor motorcycle has developed a strange symtom, it cuts out as regular as clockwork after 15 seconds. The revs start to drop at 12 seconds forcing the engine to stall at 15 seconds.

My friend was riding the bike when it started to stall and he reported that the stalling started happening intermittently although it now occurs consistently every 15 seconds.

Now, this bike has quite a history. I've ridden it around North & South America; it has 80,000 miles on the clock and was recently rear ended. In the process or repairing the motorcycle I had to replace the rear subframe and this symptom has reared it's ugly head directly afterward this.

I have a GS911 so I plugged it in, but the fool that I am I reset the fault codes to see if a new fault would emerge, but not before I noted that it had previously reported issues with the injector that were no longer there. I've been unable to get the fault codes to reoccur despite the motorcycle continuing to cut out. Using my GS911 the only fault I've diagnosed so far is a faulty radiator fan. Although that is probably a separate issue. Injector, fuel pump, tank venting valve, idle actuator and temperature warning light tests show that these are working fine.

I have reset the BMS unit and checked connections to the fuel pump.

The battery is reasonably new, the spark plugs are brand new.

Recent work includes:

• New rear subframe installed (involves lots of unplugging of sensors including ABS)
• Throttle cable replaced (involves opening ignition housing on right hand grip)
• Valve shim adjustment

I have had previous electrical issues with a shorting cable coming from a relay to the fuel pump, and a shorting to the air intake sensor in the air snorkel. Both have repairs to the cables, a visual inspection shows they look fine. My side kick sensor has been removed, a visual check of the wiring there also shows all is OK.

I am looking through the wiring loom for issues.

Have any of you had a similar problem, or can any of you point me in the right direction? I'm thinking it's electrical, a sensor or something but would love to have some wise words from any of you who may have suffered similar symptoms.

Many thanks

*** Edit****

Additional information:

I just wanted to add to my post that now the temperature outside has dropped I timed how long it took to stall and in the cold it takes longer; 24 seconds

Just a thought.... could this realistically be caused by the pressure regulator in the fuel filter?