My 2004 1150GS (39,000 miles) has just a tiny bit of play in the rear wheel. It’s barely perceptible but I don’t think it was there before. I change the lube every 3-4K miles when I change engine oil and I use 75W-90 full synth. The magnetic plug shows no chunks but there is a grey “dust” that accumulates on the magnet. Is this normal? I would like to purchase the bearing, seal and o-ring now in order to be ready in case of a failure while I’m on an upcoming trip. All of the dealer sites I’ve looked at pretty much tow the line with pricing. Is there a better priced source that still provides a quality product? I’m not opposed to spending money to get good parts, I just don’t want to spend more than necessary. Thanks all.