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How do you adjust the idle not choke 1989 Suzuki 450 motorcycle - revs high in neutral?

To adjust the idle speed on a 1989 Suzuki 450 motorcycle:

1. Start the motorcycle and let it warm up to its normal operating temperature.

2. Locate the idle speed adjustment screw on the carburetor. It is usually a small screw with a spring-loaded knob on top.

3. Turn the idle speed adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it.

4. Adjust the idle speed until it is about 1,200 RPM.

5. Once the idle speed is correct, tighten the locknut on the idle speed adjustment screw to prevent it from moving.

If your motorcycle still revs high in neutral after you have adjusted the idle speed, it may need a carburetor adjustment or other repairs. In this case, it is best to take the bike to a qualified motorcycle mechanic for diagnosis and repair.