YAMAHA AIR SCREW 6E5-14323-03

Function and technical context

This screw is part of the air intake system of the Yamaha engine, where it performs a fixing and sealing function in the intake ducts. Its location in the air intake is critical to maintain the integrity of the engine breathing system and avoid uncontrolled air leaks that compromise fuel dosing. An air screw in poor condition or poorly tightened can cause parasitic air entry, leading to lean mixtures, loss of power and unstable idle. Additionally, it directly affects cooling efficiency by influencing air flows through the engine.

When to replace this part?

It is advisable to inspect this screw during each seasonal inspection, especially if you observe irregular idling, increased fuel consumption or difficulty starting when cold, symptoms that reveal leaks in the intake system. If the screw shows corrosion, head deformation or loss of tightening after previous inspections, it is advisable to replace it preventively. Changing this component early avoids erroneous diagnosis and higher repair costs resulting from secondary injection or mixture problems.

Equivalent manufacturer part numbers