Motorcycle valve adjustment problem

1. How long will the valve clearance become larger? There is no accurate standard for this, but cars with high frequency are more likely to get bigger.

2. If the valve clearance becomes larger, one valve clearance may become larger, or both valve clearances may become larger.

3. No valve will get bigger easily, but it seems that the intake will get bigger and faster. Large valve clearance is a crisp metal knocking sound. The sound of large intake valve clearance is the same as that of large exhaust valve clearance. You can't tell which problem it is by sound alone. You must check it before you can be sure.

Generally speaking, the intake valve can be slightly larger than the exhaust valve, but in fact it is mostly adjusted to a standard. The valve clearance of the injector is generally 0.05-0.06, and the maximum is not more than 0.08. However, it is generally adjusted by hand feeling, that is, there is a gap on the left and right, and you can move freely, and there is no gap up and down. After the piston is aligned to the top dead center (it must be the compression top dead center, that is, the two valves of the left and right magneto can't move after the T point is aligned), the two valves can be adjusted at one time without adjusting the timing twice. However, after the valve adjustment, it is better to rotate the magneto for two weeks, re-align, and check whether the valve clearance has changed again, which is more accurate.

There is no difference between clockwise and counterclockwise for the injector, but for some engines with decompression mechanism on camshaft, the magneto must rotate counterclockwise, otherwise the valve clearance may be incorrect. However, no matter what kind of engine, it is best to rotate the crankshaft counterclockwise.