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 you adjust the idle on a Harley Davidson?

  • Harley Davidson will low idle stall when your idle speed isn鈥檛 high, utilize a suitable Philips screwdriver to turn the screw in the clockwise direction. If the idle screw is beneath and if the coil is vertically positioned, then you want to turn the screw in an anticlockwise direction.

  • How do you adjust the idle on a Toyota Corolla?

  • Turn the idle screw slowly using a screwdriver, twisting the screw counter-clockwise to lower the motor’s RPM or clockwise to increase RPM. Stop adjusting the screw when the tachometer indicates the desired RPM range.

  • How do you use the idle mixture screw on a motorcycle?

  • Screw in the idle mixture screw until the bike develops a lean misfire, which will sound like the engine is sneezing back through the carburetor. Once the engine begins to misfire, back the idle mixture screw out just until the misfire stops.

  • How to control the idle speed of your motorcycle?

  • Also, you can regulate the idle speed using the small knob that pokes out of your bike鈥檚 engine section positioned on the left or right side. This is particularly true for those using fuel-injected motorcycles. If your bike does not come with such a knob, a low or high speed will normally signal a mechanical issue or an unclean engine compartment.