How to Solve the Issue of System Running Too Rich at Idle in Cylinder Bank 1?

[HarleyMarie]

The solutions for the issue of system running too rich at idle in cylinder bank 1 are: 1. Replace the filter; 2. Clean the throttle valve; 3. Replace the main jet; 4. Replace the float needle valve; 5. Replace the vacuum lines and ball valve. The causes of the system running too rich at idle in cylinder bank 1 are: 1. The air filter is too dirty, and the filter screen is clogged; 2. The throttle valve is not fully opened; 3. Improper cleaning of the main jet, resulting in jet damage and increased flow; 4. Oil leakage due to a cracked float or the triangular needle valve not sealing properly, leading to an excessively high fuel level in the float chamber; 5. The vacuum or mechanical fuel-saving ball valve not sealing properly, causing oil leakage and increasing the fuel supply to the main venturi.