Bike taken off for sale , just found oil leak on final drive and rear wheel.
That explains why the back wheel slipped out yesterday. I thought it was just gravel, but I think it was a bit of oil on the back wheel. Luckily, I had the wife on the back and it kept the traction going!
I will now find out how good Moto Guzzi are at warranties! It is really annoying when it has just come back from a first service.
No oil from the little peephole, it seems to be coming from the main wheel seal.
Kind regards, David