Reducing Valve Noise on BMW Airhead Motorcycles
I did a tune-up and it is now running great--except for a slight valve noise...
This is a fairly common complaint. Could be from a couple of sources:
- There may be excessive up and down play in the rocker arm assembly. Especially on the /5s and /6s where they don't have any self-centering rocker arm mounting posts. With time, they can get loose and noisy. When you torque the heads, prior to setting the valves, loosen one set of nuts that secure a rocker arm to the mounting posts. Use a large set of channel lock (water pump pliers) or a C-clamp with two sockets and firmly but not REAL tightly squeeze the assembly together whilst tightening the two nuts. Torque those two nuts to