That is a tough one. Obviously, more use would encourage them to move about, but modern Japanese engines can be very forgiving. The only way for an owner, if he is doing the work himself, is, indeed, to do the work himself, and keep an eye how his or her engine wants to behave. There are sooo many variables, oil used, change intervals, how hot the engine gets and for how long. Man, I could on and on, and not have a clue. With my 86 GSXR, the valves moved around a bit in the first 10,000 miles, then setteld down for a 30,000 mile stretch. I'd go in to check them each winter during down time, and find them within spec. "FINE, be that way!" I'd say with a big grin on my face, sipping a cold one. You can be real nit picky and write down what you set them at, and keep track from there. I was never that picky. I do tend to set them on the loose side of the tolerance called for, as you can't really hear them tighten up, and that can be more damaging than being too loose, especially for the exhaust valves. I figure that tiny extra bit of time closed will help the exhaust valves bleed away a few more BTUs. Your mileage may very {Chuckle}.
Topic: ? about pilot jet plugs in my B4 carb? (Read 3979 times)