Keith S Posted October 22, 2007 Share Posted October 22, 2007 I experienced a FD failure on my 2004 R1150RT at 35000 km. I was traveling just outside of Billings Montana and noticed a sound coming from the bike at low speed that I thought was road/tire noise. I continued the trip and was averaging 140 KPH to the next stop. When I slowed down I again heard the same noise, pulled in the clutch and the noise was still there this time on a side road not the pavement of the interstate. Once I got to the campsite I drained the FD oil and it was black. There is a whole story of flying back to Calgary and coming back with a trailer to retrieve the RT. Upon disassembly of the FD it turned out the only failure was the main crown bearing, yes the one you have heard a lot about. This scared the crap out of me, my estimate is that the bearing would have completely failed in about 2 more hours of ride time at 140 KPH (87 MPH) and the thought of the FD failing at that speed …..well I’m just thankful that it didn’t I had changed the FD oil before the trip and the drain plug magnet was clean so this means that the bearing went from no indication of failure to failure in less the 2000 km (1220 miles). Other people have experienced the same thing….no warning or indication. Having said all that I am thinking of changing the crown bearing on a proactive basis every 30,000 km. Here is a post "changes my bearings" that covers the debate of changing the crown bearing without reshimming. If my new crown bearing also measures within spec of the old bearing then I will just install it without reshimming……comments/thoughts?? Keith Link to comment
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