It's winter now, and I'm out in the garage playing with my K1 sidecar rig. With all the plastic off, I've checked valve clearance, and found the intakes at .006 and the exhausts at .008 in. The books call for intakes at .006 to .008 in. and exhausts at .010 to .012 in.
The valves were last adjusted by a mechanic at a BMW dealership, about 20,000 miles ago. I'm wondering whether all the valves have closed up at exactly the same rate, or whether the mechanic set them closer than my specs call for.
And, since the old beast has to pull a sidecar around, I decided to pull the driveline out and check the U joints. I had heard some scuttlebut from the K1 guys about exploding U joints at about 40,000 to 50,000 miles. All the Paralever pivot bearings are notched and need replacing, and I'll do the boots too. There is no perceptible sticking or clicking in the U joint bearings, but should I replace the U joints now? I have to assume they are expensive, and the forward U joint seems to be part of the drive tube, for more bucks.
Anyone got advice on these subjects?