how to adjust the idle on a motorcycle

Best answer


Many older motorcycles that use a carburetor to mix the air and fuel, set the idle with a simplestop screw. The screw prevents the throttle valves from closing completely, allowing fuel to consistently flow into the motor when you are off of the throttle. Just simply turn the screw in or out to adjust the idle.

People also ask


  • How do I adjust the idle speed on my bike?

  • If you have a carburetor on your bike, the idle speed can be adjusted by the aptly named idle screw. If you have a fuel-injected bike, you may be able to adjust the idle speed with the small knob that sticks out of engine compartment on the left or right side of the bike.

  • What does idle speed mean on a motorcycle?

  • Learn more… A motorcycle鈥檚 idle speed refers to the how fast your motorcycle rolls forward when you release the brake with the engine running. If you have a carburetor on your bike, the idle speed can be adjusted by the aptly named idle screw.

  • Where is the idle control screw on a motorcycle?

  • The screw is usually located on the carburetor near the choke. This same screw system is used on the first generation of fuel injected motorcycle engines. Newer models that have fuel injection systems have an ECU (Engine Control Unit) that controls the idle level.

  • What to do if your idle speed is too low?

  • If your idle speed is too low, use a Phillips head screwdriver to turn the idle screw clockwise. If the coil is vertical and the screw is at the bottom, you need to turn the screw counterclockwise if you鈥檙e looking at it from above.