Flatfish:
I suspect that your bike may be infected with the Spanish and Eurozone monetary fiasco syndrome.
They, too, have problems with the banks........
All of my research in the field leads me to believe that it is, in fact, an exhaust porting issue. Our Head off Research has confirmed this.
The North East port may be causing difficulties in inclement weather, and the old advice of "N.E. Port in a Storm" springs to mind.
On the other hand, Keith Richards has just invested in a peat harvesting machine, and so old adages don't work as well as they used to, particularly the one about Rolling Stones and moss-gathering. So you may choose to disregard this advice.
As a suspension guru, I counsel meditation, or levitation, medication, mediation, a modicum of moderation, or filling the tyres with helium.
You choose.
Did Knobbly mind that you let his tyres down?
I suspect he may have wee'd in your tank.
Your mate with the 125 may have better MPG, but you really shouldn't compare intercity trains with motorised two-wheelers; it's as much use as comparing apples to Orange ones.
So hopefully that's cleared that one up.
Now, can anyone tell me who the hell Queen Julie B is?

It's not falling off, it's an upgrade opportunity.