redpadraig
Registered user
I was recently on a long spin that included Bulgaria. About 20km into the hills on a single track road I began to hear this rubbing noise. Being alone all sorts of thoughts ran through my mind
Is the noise coming from the Gearbox, Driveshaft, or the Differential? To cut a long story short I nursed the bike back to the nearest city “Plovdiv” and contacted my Insurance Co. The nearest BMW dealer was in Sofia, about 150km away. Eventually the bike was collected and brought there. I got immediate attention from both the service manager and the Mechanic “Nickey”. The diagnosis was, the bearings in the Diff were gone. The choice was, replace the whole unit or replace the bearings. I went for the latter.
On collecting the bike several days later I had a word with Nickey to get his view on what might have caused this problem. He said it could be the oil. I didn’t think this was the case as I had replaced the oil prior to the trip with the correct amount. He then said, it would be normal for him to replace bearings at 70,000 to 80,000 km on BMW’s because of the condition of the roads in Bulgaria. My bike had 78,000 km on it at the time. My general biking use at home in Ireland would be on rougher roads.
Does it make sense the rougher roads could contribute to this type of problem, if so, it’s something to keep in mind if you are planning a long trip
There is one other issue I will mention. Be aware of your side stand. On taking a break off the bike for something to eat I returned to the bike and as I stood beside the machine it started leaning towards me. I had no alternative only to let it down on the ground. The side stand had broken up close to where it swivels. I contribute some of the cause to the weight I was carrying but mostly to the poor quality of the side stand itself. For the future I will have the side stand reinforced or change the lean angle of the bike when using the side stand
Is the noise coming from the Gearbox, Driveshaft, or the Differential? To cut a long story short I nursed the bike back to the nearest city “Plovdiv” and contacted my Insurance Co. The nearest BMW dealer was in Sofia, about 150km away. Eventually the bike was collected and brought there. I got immediate attention from both the service manager and the Mechanic “Nickey”. The diagnosis was, the bearings in the Diff were gone. The choice was, replace the whole unit or replace the bearings. I went for the latter.On collecting the bike several days later I had a word with Nickey to get his view on what might have caused this problem. He said it could be the oil. I didn’t think this was the case as I had replaced the oil prior to the trip with the correct amount. He then said, it would be normal for him to replace bearings at 70,000 to 80,000 km on BMW’s because of the condition of the roads in Bulgaria. My bike had 78,000 km on it at the time. My general biking use at home in Ireland would be on rougher roads.
Does it make sense the rougher roads could contribute to this type of problem, if so, it’s something to keep in mind if you are planning a long trip

There is one other issue I will mention. Be aware of your side stand. On taking a break off the bike for something to eat I returned to the bike and as I stood beside the machine it started leaning towards me. I had no alternative only to let it down on the ground. The side stand had broken up close to where it swivels. I contribute some of the cause to the weight I was carrying but mostly to the poor quality of the side stand itself. For the future I will have the side stand reinforced or change the lean angle of the bike when using the side stand

