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Main Air Jets

Mikuni Air Jet, BS30/97, 0.0, 002-149
Part number:
002-149

Air bleed jets change the slope of the fuel delivery curve while moving the entirety up or down. Larger means leaner with emphasis towards the top, while smaller means richer with emphasis towards the top.

Jet sizes other than original are not legal for sale or use on emission-controlled vehicles in the state of California and in other localities.

Torque specification: 0.4 Nm (3.5 in-lbs).

Manufacturer: 

genuine Mikuni
$5.95

Remove the pressed in main air jet, tap the hole M4X.7 and use this jet to tailor main air correction. Standard (pressed in) size is 0.7.

Yamaha XJ650L Seca Turbo 1982

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